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119-513: Sylhet District ( Bengali : সিলেট জেলা ), located in north-east Bangladesh , is one of the four districts in Sylhet Division , which contains Sylhet , the regional capital. Sylhet District was created in 1772 after this area was acquired by the British in 1767 and Mr. William Thackeray was appointed as the first collector. Current Sylhet District consists of 12 (Twelve) Upazilas. Sylhet District

238-413: A humid subtropical climate ( Cwa ) at higher elevations. The rainy season starts from April to October and it is so hot and humid with very heavy showers and thunderstorms almost every day, whilst the short dry season starts from November to February and it is very warm and fairly clear. Nearly 80% of the annual average rainfall of 4,200 millimetres (170 in) occurs between May and September. The city

357-492: A bid to lessen this burden on young learners, efforts have been made by educational institutions in the two main Bengali-speaking regions (West Bengal and Bangladesh) to address the opaque nature of many consonant clusters, and as a result, modern Bengali textbooks are beginning to contain more and more "transparent" graphical forms of consonant clusters, in which the constituent consonants of a cluster are readily apparent from

476-526: A broader aridification trend. The EMCI ended 18 million years ago, giving way to the Middle Miocene Warm Interval (MMWI), the warmest part of which was the MMCO that began 16 million years ago. As the world transitioned into the MMCO, carbon dioxide concentrations varied between 300 and 500 ppm. Global annual mean surface temperature during the MMCO was about 18.4 °C. MMCO warmth was driven by

595-519: A clade of large terrestrial predatory crocodyliformes distantly related to modern crocodilians, from which they likely diverged over 180 million years ago, are known from the Miocene of South America. The last Desmostylians thrived during this period before becoming the only extinct marine mammal order. The pinnipeds , which appeared near the end of the Oligocene, became more aquatic. A prominent genus

714-561: A cooler, drier climate. C 4 grasses, which are able to assimilate carbon dioxide and water more efficiently than C 3 grasses, expanded to become ecologically significant near the end of the Miocene between 6 and 7 million years ago, although they did not expand northward during the Late Miocene. The expansion of grasslands and radiations among terrestrial herbivores correlates to fluctuations in CO 2 . One study, however, has attributed

833-590: A different word from a speaker of Standard Bengali in Bangladesh, even though both words are of native Bengali descent. For example, the word salt is লবণ lôbôṇ in the east which corresponds to নুন nun in the west. Bengali exhibits diglossia , though some scholars have proposed triglossia or even n-glossia or heteroglossia between the written and spoken forms of the language. Two styles of writing have emerged, involving somewhat different vocabularies and syntax : Linguist Prabhat Ranjan Sarkar categorises

952-480: A diphthong. The total number of diphthongs is not established, with bounds at 17 and 31. An incomplete chart is given by Sarkar (1985) of the following: In standard Bengali, stress is predominantly initial. Bengali words are virtually all trochaic ; the primary stress falls on the initial syllable of the word, while secondary stress often falls on all odd-numbered syllables thereafter, giving strings such as in সহযোগিতা shô -hô- jo -gi- ta "cooperation", where

1071-473: A good analogue for future warmer climates caused by anthropogenic global warming , with this being especially true of the global climate during the Middle Miocene Climatic Optimum (MMCO), because the last time carbon dioxide levels were comparable to projected future atmospheric carbon dioxide levels resulting from anthropogenic climate change was during the MMCO. The Ross Sea margin of

1190-435: A good model for a "living fossil". Eucalyptus fossil leaves occur in the Miocene of New Zealand , where the genus is not native today, but have been introduced from Australia . Both marine and continental fauna were fairly modern, although marine mammals were less numerous. Only in isolated South America and Australia did widely divergent fauna exist. In Eurasia, genus richness shifted southward to lower latitudes from

1309-672: A large scale and were communally limited. Owing to Bengal's geographic location, Bengali areas bordering non-Bengali regions have been influenced by each other. Small numbers of people in Midnapore , which borders Odisha , have used the Odia script to write in Bengali. In the border areas between West Bengal and Bihar , some Bengali communities historically wrote Bengali in Devanagari , Kaithi and Tirhuta . In Sylhet and Bankura , modified versions of

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1428-738: A literacy rate of 76.43% (for 7 years and above), compared to the national average of 74.80%, and a sex ratio of 96.74 males per 100 females. According to the census, Sylhet's literacy rate has increased to 76.43%. In contrast, it was 51.18% in 2011, 45.49% in 2001, and 33.85% in 1991. In Sylhet, 89.25% of students are enrolled in general education. Additionally, 7.95% are pursuing religious education, 0.40% are in technical education, and 2.40% are in other forms of education. In 2022, 65.37% of people aged 15 and above have their own mobile phones. Moreover, 42.02% are internet users, and 31.87% have accounts in banks or financial institutions. The same percentage, 31.87%, also have mobile banking accounts. According to

1547-579: A major expansion of Antarctic glaciers. This severed the connection between the Indian Ocean and the Mediterranean Sea and formed the present land connection between Afro-Arabia and Eurasia. The subsequent uplift of mountains in the western Mediterranean region and a global fall in sea levels combined to cause a temporary drying up of the Mediterranean Sea (known as the Messinian salinity crisis ) near

1666-480: A major expansion of grass-grazer ecosystems . Herds of large, swift grazers were hunted by predators across broad sweeps of open grasslands , displacing desert, woodland, and browsers . The higher organic content and water retention of the deeper and richer grassland soils , with long-term burial of carbon in sediments, produced a carbon and water vapor sink. This, combined with higher surface albedo and lower evapotranspiration of grassland, contributed to

1785-660: A majority in Bangladesh speaks dialects notably different from SCB. Some dialects, particularly those of the Chittagong region, bear only a superficial resemblance to SCB. The dialect in the Chittagong region is least widely understood by the general body of Bengalis. The majority of Bengalis are able to communicate in more than one variety – often, speakers are fluent in Cholitobhasha (SCB) and one or more regional dialects. Even in SCB,

1904-567: A part in the adoption of the English alphabet to write Bengali, with certain social media influencers publishing entire novels in Roman Bengali. Miocene As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages . The Miocene boundaries are not marked by distinct global events but by regionally defined transitions from

2023-562: A rounded total of 280 million) worldwide. The Bengali language is native to the region of Bengal , which comprises the present-day nation of Bangladesh and the Indian state of West Bengal . Besides the native region it is also spoken by the Bengalis living in Tripura , southern Assam and the Bengali population in the Indian union territory of Andaman and Nicobar Islands . Bengali is also spoken in

2142-578: A significant drop in atmospheric carbon dioxide levels. Both continental and oceanic thermal gradients in mid-latitudes during the Early Miocene were very similar to those in the present. Global cooling caused the East Asian Summer Monsoon (EASM) to begin to take on its modern form during the Early Miocene. From 22.1 to 19.7 Ma, the Xining Basin experienced relative warmth and humidity amidst

2261-695: A significant local decline along the northeastern coast of Australia during the Tortonian, most likely due to warming seawater. Cetaceans attained their greatest diversity during the Miocene, with over 20 recognized genera of baleen whales in comparison to only six living genera. This diversification correlates with emergence of gigantic macro-predators such as megatoothed sharks and raptorial sperm whales . Prominent examples are O. megalodon and L. melvillei . Other notable large sharks were O. chubutensis , Isurus hastalis , and Hemipristis serra . Crocodilians also showed signs of diversification during

2380-408: A special diacritic, called the hôsôntô (্) , may be added below the basic consonant grapheme (as in ম্ [m] ). This diacritic, however, is not common and is chiefly employed as a guide to pronunciation. The abugida nature of Bengali consonant graphemes is not consistent, however. Often, syllable-final consonant graphemes, though not marked by a hôsôntô , may carry no inherent vowel sound (as in

2499-575: A state language of the then Dominion of Pakistan . On 21 February 1952, five students and political activists were killed during protests near the campus of the University of Dhaka ; they were the first ever martyrs to die for their right to speak their mother tongue. In 1956, Bengali was made a state language of Pakistan. 21 February has since been observed as Language Movement Day in Bangladesh and has also been commemorated as International Mother Language Day by UNESCO every year since 2000. In 2010,

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2618-461: A vital role in the Bangladeshi economy . Several of Bangladesh's finance ministers have been Members of Parliament from the city of Sylhet. According to 2022 Census of Bangladesh , Sylhet district had 746854 households and a population of 3,857,123, 26.25% of whom lived in urban areas. The population density was 1,117 people per square kilometre. 20.29% were under 10 years of age. Sylhet district had

2737-463: A vowel in isolation from any preceding or following consonant, the independent form of the vowel is used. For example, in মই [moj] "ladder" and in ইলিশ [iliʃ] "Hilsa fish", the independent form of the vowel ই is used (cf. the dependent form ি) . A vowel at the beginning of a word is always realised using its independent form. In addition to the inherent-vowel-suppressing hôsôntô , three more diacritics are commonly used in Bengali. These are

2856-627: A zone of low rainfall in the Late Miocene. The Indian Plate continued to collide with the Eurasian Plate , creating new mountain ranges and uplifting the Tibetan Plateau , resulting in the rain shadowing and aridification of the Asian interior. The Tian Shan experienced significant uplift in the Late Miocene, blocking westerlies from coming into the Tarim Basin and drying it as a result. At

2975-441: Is Bangladesh's national march, written by The National Poet Kazi Nazrul Islam in Bengali in 1928. It was adopted as the national marching song by the Bangladeshi government in 1972. Additionally, the first two verses of Vande Mataram , a patriotic song written in Bengali by Bankim Chandra Chatterjee , was adopted as the "national song" of India in both the colonial period and later in 1950 in independent India. Furthermore, it

3094-536: Is a classical Indo-Aryan language from the Indo-European language family native to the Bengal region of South Asia. With over 237 million native speakers and another 41 million as second language speakers as of 2024, Bengali is the fifth most spoken native language and the seventh most spoken language by the total number of speakers in the world. It is the fifth most spoken Indo-European language . Bengali

3213-468: Is a cursive script with eleven graphemes or signs denoting nine vowels and two diphthongs , and thirty-nine graphemes representing consonants and other modifiers. There are no distinct upper and lower case letter forms. The letters run from left to right and spaces are used to separate orthographic words . Bengali script has a distinctive horizontal line running along the tops of the graphemes that links them together called মাত্রা matra . Since

3332-400: Is an abugida , a script with letters for consonants, with diacritics for vowels, and in which an inherent vowel (অ ô ) is assumed for consonants if no vowel is marked. The Bengali alphabet is used throughout Bangladesh and eastern India (Assam, West Bengal, Tripura). The Bengali alphabet is believed to have evolved from a modified Brahmic script around 1000 CE (or 10th–11th century). It

3451-668: Is believed by many that the national anthem of Sri Lanka ( Sri Lanka Matha ) was inspired by a Bengali poem written by Rabindranath Tagore , while some even believe the anthem was originally written in Bengali and then translated into Sinhala . After the contribution made by the Bangladesh UN Peacekeeping Force in the Sierra Leone Civil War under the United Nations Mission in Sierra Leone ,

3570-774: Is complex having diverse sacrificial geomorphology; high topography of Plio- Miocene age. Available limestone deposits in different parts of the region suggest that the whole area was under the ocean in the Oligo-Miocene. In the last 150 years three major earthquakes hit the city, at a magnitude of at least 7.5 on the Richter Scale , the last one took place in 1918, although many people are unaware that Sylhet lies on an earthquake prone zone. [REDACTED] Media related to Sylhet District at Wikimedia Commons Bengali language Bengali , also known by its endonym Bangla ( বাংলা , Bāṅlā , [ˈbaŋla] ),

3689-649: Is considered a separate language, although it shares similarities to Northern Bengali dialects. During the standardisation of Bengali in the 19th century and early 20th century, the cultural centre of Bengal was in Kolkata , a city founded by the British. What is accepted as the standard form today in both West Bengal and Bangladesh is based on the West-Central dialect of Nadia and Kushtia District . There are cases where speakers of Standard Bengali in West Bengal will use

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3808-404: Is known as Apabhraṃśa , by the end of the first millennium. The Bengali language evolved as a distinct language over the course of time. Though some archaeologists claim that some 10th-century texts were in Bengali, it is not certain whether they represent a differentiated language or whether they represent a stage when Eastern Indo-Aryan languages were differentiating. The local Apabhraṃśa of

3927-402: Is located within the region where there are hills and basins which constitute one of the most distinctive regions in Bangladesh. The physiography of Sylhet consists mainly of hill soils, encompassing a few large depressions known locally as " beels " which can be mainly classified as oxbow lakes , caused by tectonic subsidence primarily during the earthquake of 1762 . Geologically, the region

4046-477: Is set out below in the International Phonetic Alphabet (upper grapheme in each box) and romanisation (lower grapheme). Bengali is known for its wide variety of diphthongs , combinations of vowels occurring within the same syllable . Two of these, /oi̯/ and /ou̯/ , are the only ones with representation in script, as ঐ and ঔ respectively. /e̯ i̯ o̯ u̯/ may all form the glide part of

4165-545: Is the official , national , and most widely spoken language of Bangladesh , with 98% of Bangladeshis using Bengali as their first language. It is the second-most widely spoken language in India . It is the official language of the Indian states of West Bengal and Tripura and the Barak Valley region of the state of Assam . It is also the second official language of the Indian state of Jharkhand since September 2011. It

4284-500: Is the most widely spoken language in the Andaman and Nicobar Islands in the Bay of Bengal , and is spoken by significant populations in other states including Bihar , Arunachal Pradesh , Delhi , Chhattisgarh , Meghalaya , Mizoram , Nagaland , Odisha and Uttarakhand . Bengali is also spoken by the Bengali diasporas ( Bangladeshi diaspora and Indian Bengalis) across Europe, North America,

4403-500: The Aesop's Fables in Bengali was printed using Roman letters based on English phonology by the Scottish linguist John Gilchrist . Consecutive attempts to establish a Roman Bengali have continued across every century since these times, and have been supported by the likes of Suniti Kumar Chatterji , Muhammad Qudrat-i-Khuda , and Muhammad Enamul Haq . The Digital Revolution has also played

4522-660: The Arabic , Persian , and Turkic languages . The arrival of merchants and traders from the Middle East and Turkestan into the Buddhist -ruling Pala Empire , from as early as the 7th century, gave birth to Islamic influence in the region. In the 13th century, subsequent Arab Muslim and Turco-Persian expeditions to Bengal heavily influenced the local vernacular by settling among the native population. Bengali absorbed Arabic and Persian influences in its vocabulary and dialect, including

4641-468: The Constitution of Bangladesh states Bengali to be the sole official language of Bangladesh. The Bengali Language Implementation Act, 1987 , made it mandatory to use Bengali in all records and correspondences, laws, proceedings of court and other legal actions in all courts, government or semi-government offices, and autonomous institutions in Bangladesh. It is also the de facto national language of

4760-471: The International Commission on Stratigraphy : Regionally, other systems are used, based on characteristic land mammals; some of them overlap with the preceding Oligocene and following Pliocene Epochs: Continents continued to drift toward their present positions. Of the modern geologic features, only the land bridge between South America and North America was absent, although South America

4879-564: The Kaithi script had some historical prominence, mainly among Muslim communities. The variant in Sylhet was identical to the Baitali Kaithi script of Hindustani with the exception of Sylhet Nagri possessing matra . Sylhet Nagri was standardised for printing in c.  1869 . Up until the 19th century, numerous variations of the Arabic script had been used across Bengal from Chittagong in

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4998-539: The Middle Miocene Climate Transition (MMCT). Abrupt increases in opal deposition indicate this cooling was driven by enhanced drawdown of carbon dioxide via silicate weathering. The MMCT caused a sea surface temperature (SST) drop of approximately 6 °C in the North Atlantic. The drop in benthic foraminiferal δ O values was most noticeable in the waters around Antarctica, suggesting cooling

5117-520: The Nadia region . Bengali shows a high degree of diglossia , with the literary and standard form differing greatly from the colloquial speech of the regions that identify with the language. Modern Bengali vocabulary is based on words inherited from Magadhi Prakrit and Pali, along with tatsamas and reborrowings from Sanskrit and borrowings from Persian , Arabic , Austroasiatic languages and other languages with which it has historically been in contact. In

5236-540: The Old World . Around the end of this epoch, the ancestors of humans had split away from the ancestors of the chimpanzees and had begun following their own evolutionary path during the final Messinian Stage (7.5–5.3 Ma) of the Miocene. As in the Oligocene before it, grasslands continued to expand, and forests to dwindle. In the seas of the Miocene, kelp forests made their first appearance and soon became one of Earth's most productive ecosystems. The plants and animals of

5355-590: The University of Karachi (established by East Pakistani politicians before Independence of Bangladesh ) also offers regular programs of studies at the Bachelors and at the Masters levels for Bengali Literature. The national anthems of both Bangladesh ( Amar Sonar Bangla ) and India ( Jana Gana Mana ) were written in Bengali by the Bengali Nobel laureate Rabindranath Tagore . Notuner Gaan known as " Chol Chol Chol"

5474-499: The boldface represents primary and secondary stress. Native Bengali words do not allow initial consonant clusters ; the maximum syllabic structure is CVC (i.e., one vowel flanked by a consonant on each side). Many speakers of Bengali restrict their phonology to this pattern, even when using Sanskrit or English borrowings, such as গেরাম geram (CV.CVC) for গ্রাম gram (CCVC) "village" or ইস্কুল iskul (VC.CVC) for স্কুল skul (CCVC) "school". The Bengali-Assamese script

5593-550: The carbon cycle occurred approximately 6 Ma, causing continental carbon reservoirs to no longer expand during cold spells, as they had done during cold periods in the Oligocene and most of the Miocene. At the end of the Miocene, global temperatures rose again as the amplitude of Earth's obliquity increased, which caused increased aridity in Central Asia. Around 5.5 Ma, the EAWM underwent a period of rapid intensification. Life during

5712-557: The phonology of Eastern Bengali is seen through the lack of nasalised vowels and an alveolar articulation of what are categorised as the "cerebral" consonants (as opposed to the postalveolar articulation of western Bengal). Some varieties of Bengali, particularly Sylheti , Chittagonian and Chakma , have contrastive tone ; differences in the pitch of the speaker's voice can distinguish words. Kharia Thar and Mal Paharia are closely related to Western Bengali dialects, but are typically classified as separate languages. Similarly, Hajong

5831-608: The 16th century, Portuguese missionaries began a tradition of using the Roman alphabet to transcribe the Bengali language. Though the Portuguese standard did not receive much growth, a few Roman Bengali works relating to Christianity and Bengali grammar were printed as far as Lisbon in 1743. The Portuguese were followed by the English and French respectively, whose works were mostly related to Bengali grammar and transliteration. The first version of

5950-409: The 1991 census, 12.99% of people in Sylhet had access to electricity. This increased to 35.14% in 2001 and 62.92% in 2011. As of the 2022 census, this figure has risen to 99.27%. In terms of employment, 35.58% of Sylhet's population is engaged in agriculture. Additionally, 10.60% are involved in industry, while the remaining 53.82% are engaged in various services. According to the 2022 data, 92.57% of

6069-637: The 19th and 20th centuries, there were two standard forms of written Bengali: In 1948, the government of Pakistan tried to impose Urdu as the sole state language in Pakistan, giving rise to the Bengali language movement . This was a popular ethnolinguistic movement in the former East Bengal (today Bangladesh ), which arose as a result of the strong linguistic consciousness of the Bengalis and their desire to promote and protect spoken and written Bengali's recognition as

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6188-576: The 6th century, which competed with the ancestor of Bengali for some time. The ancestor of Bengali was the language of the Pala Empire and the Sena dynasty . During the medieval period, Middle Bengali was characterised by the elision of the word-final অ ô and the spread of compound verbs, which originated from the Sanskrit Schwa . Slowly, the word-final ô disappeared from many words influenced by

6307-451: The Bengali equivalent of a full stop – have been adopted from Western scripts and their usage is similar. Unlike in Western scripts (Latin, Cyrillic, etc.) where the letter forms stand on an invisible baseline, the Bengali letter-forms instead hang from a visible horizontal left-to-right headstroke called মাত্রা matra . The presence and absence of this matra can be important. For example,

6426-426: The Bengali script is an abugida, its consonant graphemes usually do not represent phonetic segments , but carry an "inherent" vowel and thus are syllabic in nature. The inherent vowel is usually a back vowel , either [ɔ] as in মত [m ɔ t] "opinion" or [o] , as in মন [m o n] "mind", with variants like the more open [ɒ] . To emphatically represent a consonant sound without any inherent vowel attached to it,

6545-673: The Central Paratethys, cut off from sources of freshwater input by its separation from the Eastern Paratethys. From 13.36 to 12.65 Ma, the Central Paratethys was characterised by open marine conditions, before the reopening of the Bârlad Strait resulted in a shift to brackish-marine conditions in the Central Paratethys, causing the Badenian-Sarmatian Extinction Event. As a result of the Bârlad Strait's reopening,

6664-826: The Early to the Middle Miocene. Europe's large mammal diversity significantly declined during the Late Miocene. In the Early Miocene, several Oligocene groups were still diverse, including nimravids , entelodonts , and three-toed equids. As in the previous Oligocene Epoch, oreodonts were still diverse, only to disappear in the earliest Pliocene. During the later Miocene mammals were more modern, with easily recognizable canids , bears , red pandas , procyonids , equids , beavers , deer , camelids , and whales , along with now-extinct groups like borophagine canids , certain gomphotheres , three-toed horses , and hornless rhinos like Teleoceras and Aphelos . The late Miocene also marks

6783-677: The East Antarctic Ice Sheet (EAIS) was highly dynamic during the Early Miocene. The Miocene began with the Early Miocene Cool Event (Mi-1) around 23 million years ago, which marked the start of the Early Miocene Cool Interval (EMCI). This cool event occurred immediately after the Oligocene-Miocene Transition (OMT) during a major expansion of Antarctica's ice sheets, but was not associated with

6902-526: The East Asian Winter Monsoon (EAWM) became stronger synchronously with a southward shift of the subarctic front. Greenland may have begun to have large glaciers as early as 8 to 7 Ma, although the climate for the most part remained warm enough to support forests there well into the Pliocene. Zhejiang, China was noticeably more humid than today. In the Great Rift Valley of Kenya , there

7021-457: The LMC; extratropical sea surface temperatures dropped substantially by approximately 7–9 °C. 41 kyr obliquity cycles became the dominant orbital climatic control 7.7 Ma and this dominance strengthened 6.4 Ma. Benthic δ O values show significant glaciation occurred from 6.26 to 5.50 Ma, during which glacial-interglacial cycles were governed by the 41 kyr obliquity cycle. A major reorganisation of

7140-563: The Late Cretaceous, are known from the Miocene of Patagonia, represented by the mole-like Necrolestes . The youngest known representatives of metatherians (the broader grouping to which marsupials belong) in Europe, Asia and Africa are known from the Miocene, including the European herpetotheriid Amphiperatherium , the peradectids Siamoperadectes and Sinoperadectes from Asia, and

7259-694: The Late Miocene, the Earth's climate began to display a high degree of similarity to that of the present day . The 173 kyr obliquity modulation cycle governed by Earth's interactions with Saturn became detectable in the Late Miocene. By 12 Ma, Oregon was a savanna akin to that of the western margins of the Sierra Nevada of northern California . Central Australia became progressively drier, although southwestern Australia experienced significant wettening from around 12 to 8 Ma. The South Asian Winter Monsoon (SAWM) underwent strengthening ~9.2–8.5 Ma. From 7.9 to 5.8 Ma,

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7378-444: The Mediterranean Sea to almost completely evaporate. This event is referred to as the " Messinian salinity crisis ". Then, at the Miocene–Pliocene boundary, the Strait of Gibraltar opened, and the Mediterranean refilled. That event is referred to as the " Zanclean flood ". Also during the early Miocene (specifically the Aquitanian and Burdigalian Stages), the apes first evolved, began diversifying, and became widespread throughout

7497-520: The Middle East and other regions. Bengali was accorded the status of a classical language by the government of India on 3 October 2024. It is the second most spoken and fourth fastest growing language in India , following Hindi in the first place, Kashmiri in the second place, and Meitei ( Manipuri ), along with Gujarati , in the third place, according to the 2011 census of India . Bengali has developed over more than 1,400 years. Bengali literature , with its millennium-old literary history,

7616-511: The Miocene Epoch was mostly supported by the two newly formed biomes , kelp forests and grasslands . Grasslands allow for more grazers, such as horses , rhinoceroses , and hippos . Ninety-five percent of modern plants existed by the end of this epoch . Modern bony fish genera were established. A modern-style latitudinal biodiversity gradient appeared ~15 Ma. The coevolution of gritty , fibrous, fire-tolerant grasses and long-legged gregarious ungulates with high-crowned teeth , led to

7735-483: The Miocene were recognizably modern. Mammals and birds were well established. Whales , pinnipeds , and kelp spread. The Miocene is of particular interest to geologists and palaeoclimatologists because major phases of the geology of the Himalaya occurred during that epoch, affecting monsoonal patterns in Asia, which were interlinked with glacial periods in the northern hemisphere. The Miocene faunal stages from youngest to oldest are typically named according to

7854-449: The Miocene. The largest form among them was a gigantic caiman Purussaurus which inhabited South America. Another gigantic form was a false gharial Rhamphosuchus , which inhabited modern age India . A strange form, Mourasuchus also thrived alongside Purussaurus . This species developed a specialized filter-feeding mechanism, and it likely preyed upon small fauna despite its gigantic size. The youngest members of Sebecidae ,

7973-413: The North American Great Plains and in Argentina . The global trend was towards increasing aridity caused primarily by global cooling reducing the ability of the atmosphere to absorb moisture, particularly after 7 to 8 million years ago. Uplift of East Africa in the late Miocene was partly responsible for the shrinking of tropical rain forests in that region, and Australia got drier as it entered

8092-529: The Oligocene–Miocene transgression. As the southern Andes rose in the Middle Miocene (14–12 million years ago) the resulting rain shadow originated the Patagonian Desert to the east. Far northern Australia was monsoonal during the Miocene. Although northern Australia is often believed to have been much wetter during the Miocene, this interpretation may be an artefact of preservation bias of riparian and lacustrine plants; this finding has itself been challenged by other papers. Western Australia, like today,

8211-433: The Qiongdongnan Basin in the northern South China Sea indicates the Pearl River was a major source of sediment flux into the sea during the Early Miocene and was a major fluvial system as in the present. During the Oligocene and Early Miocene, the coast of northern Brazil, Colombia, south-central Peru , central Chile and large swathes of inland Patagonia were subject to a marine transgression . The transgressions in

8330-423: The activity of the Columbia River Basalts and enhanced by decreased albedo from the reduction of deserts and expansion of forests. Climate modelling suggests additional, currently unknown, factors also worked to create the warm conditions of the MMCO. The MMCO saw the expansion of the tropical climatic zone to much larger than its current size. The July ITCZ, the zone of maximal monsoonal rainfall, moved to

8449-472: The aridity of the former. Unequivocally-recognizable dabbling ducks , plovers , typical owls , cockatoos and crows appear during the Miocene. By the epoch's end, all or almost all modern bird groups are believed to have been present; the few post-Miocene bird fossils which cannot be placed in the evolutionary tree with full confidence are simply too badly preserved, rather than too equivocal in character. Marine birds reached their highest diversity ever in

8568-536: The basis of modern standard colloquial Bengali. In the dialects prevalent in much of eastern and south-eastern Bangladesh ( Barisal , Chittagong , Dhaka and Sylhet Divisions of Bangladesh), many of the stops and affricates heard in West Bengal and western Bangladesh are pronounced as fricatives . Western alveolo-palatal affricates চ [ tɕɔ ] , ছ [ tɕʰɔ ] , জ [ dʑɔ ] correspond to eastern চ [tsɔ] , ছ [tsʰɔ~sɔ] , জ [dzɔ~zɔ] . The influence of Tibeto-Burman languages on

8687-619: The beginning of the Miocene, the northern margin of the Arabian plate, then part of the African landmass, collided with Eurasia; as a result, the Tethys seaway continued to shrink and then disappeared as Africa collided with Eurasia in the Turkish – Arabian region. The first step of this closure occurred 20 Ma, reducing water mass exchange by 90%, while the second step occurred around 13.8 Ma, coincident with

8806-469: The consonant which comes first is put on top of or to the left of the one that immediately follows. In these ligatures, the shapes of the constituent consonant signs are often contracted and sometimes even distorted beyond recognition. In the Bengali writing system, there are nearly 285 such ligatures denoting consonant clusters. Although there exist a few visual formulas to construct some of these ligatures, many of them have to be learned by rote. Recently, in

8925-503: The country. In India, Bengali is one of the 23 official languages . It is the official language of the Indian states of West Bengal , Tripura and in Barak Valley of Assam . Bengali has been a second official language of the Indian state of Jharkhand since September 2011. In Pakistan , Bengali is a recognised secondary language in the city of Karachi mainly spoken by stranded Bengalis of Pakistan . The Department of Bengali in

9044-566: The course of this epoch . The youngest representatives of Choristodera , an extinct order of aquatic reptiles that first appeared in the Middle Jurassic , are known from the Miocene of Europe, belonging to the genus Lazarussuchus , which had been the only known surviving genus of the group since the beginning of the Eocene. The last known representatives of the archaic primitive mammal order Meridiolestida , which dominated South America during

9163-587: The development of Dobhashi . Bengali acquired prominence, over Persian, in the court of the Sultans of Bengal with the ascent of Jalaluddin Muhammad Shah . Subsequent Muslim rulers actively promoted the literary development of Bengali, allowing it to become the most spoken vernacular language in the Sultanate. Bengali adopted many words from Arabic and Persian , which was a manifestation of Islamic culture on

9282-672: The east to Meherpur in the west. The 14th-century court scholar of Bengal, Nur Qutb Alam , composed Bengali poetry using the Persian alphabet . After the Partition of India in the 20th century, the Pakistani government attempted to institute the Perso-Arabic script as the standard for Bengali in East Pakistan ; this was met with resistance and contributed to the Bengali language movement. In

9401-549: The eastern subcontinent, Purbi Apabhraṃśa or Abahatta (lit. 'meaningless sounds'), eventually evolved into regional dialects, which in turn formed three groups, the Bengali–Assamese languages , the Bihari languages , and the Odia language . The language was not static: different varieties coexisted and authors often wrote in multiple dialects in this period. For example, Ardhamagadhi is believed to have evolved into Abahatta around

9520-564: The end of the Miocene due to increased habitat uniformity. The expansion of grasslands in North America also led to an explosive radiation among snakes. Previously, snakes were a minor component of the North American fauna, but during the Miocene, the number of species and their prevalence increased dramatically with the first appearances of vipers and elapids in North America and the significant diversification of Colubridae (including

9639-478: The end of the Miocene. The Paratethys underwent a significant transgression during the early Middle Miocene. Around 13.8 Ma, during a global sea level drop, the Eastern Paratethys was cut off from the global ocean by the closure of the Bârlad Strait, effectively turning it into a saltwater lake. From 13.8 to 13.36 Ma, an evaporite period similar to the later Messinian salinity crisis in the Mediterranean ensued in

9758-612: The enigmatic Saint Bathans Mammal . Microbial life in the igneous crust of the Fennoscandian Shield shifted from being dominated by methanogens to being primarily composed of sulphate-reducing prokaryotes . The change resulted from fracture reactivation during the Pyrenean-Alpine orogeny, enabling sulphate-reducing microbes to permeate into the Fennoscandian Shield via descending surficial waters. Diatom diversity

9877-461: The evolution of both groups into modern representatives. The early Miocene Saint Bathans Fauna is the only Cenozoic terrestrial fossil record of the landmass, showcasing a wide variety of not only bird species, including early representatives of clades such as moa , kiwi and adzebills , but also a diverse herpetofauna of sphenodontians , crocodiles and turtles as well as a rich terrestrial mammal fauna composed of various species of bats and

9996-499: The expansion of grasslands not to a CO 2 drop but to the increasing seasonality and aridity, coupled with a monsoon climate, which made wildfires highly prevalent compared to before. The Late Miocene expansion of grasslands had cascading effects on the global carbon cycle, evidenced by the imprint it left in carbon isotope records. Cycads between 11.5 and 5 million years ago began to rediversify after previous declines in variety due to climatic changes, and thus modern cycads are not

10115-711: The extinction of the last-surviving members of the hyaenodonts . Islands began to form between South and North America in the Late Miocene, allowing ground sloths like Thinobadistes to island-hop to North America. The expansion of silica-rich C 4 grasses led to worldwide extinctions of herbivorous species without high-crowned teeth . Mustelids diversified into their largest forms as terrestrial predators like Ekorus , Eomellivora , and Megalictis and bunodont otters like Enhydriodon and Sivaonyx appeared. Eulipotyphlans were widespread in Europe, being less diverse in Southern Europe than farther north due to

10234-466: The final ন in মন [m o n] or the medial ম in গামলা [ɡamla] ). A consonant sound followed by some vowel sound other than the inherent [ɔ] is orthographically realised by using a variety of vowel allographs above, below, before, after, or around the consonant sign, thus forming the ubiquitous consonant-vowel typographic ligatures . These allographs, called কার kar , are diacritical vowel forms and cannot stand on their own. For example,

10353-604: The findings of marine invertebrate fossils of both Atlantic and Pacific affinity in La Cascada Formation . Connection would have occurred through narrow epicontinental seaways that formed channels in a dissected topography . The Antarctic Plate started to subduct beneath South America 14 million years ago in the Miocene, forming the Chile Triple Junction . At first the Antarctic Plate subducted only in

10472-714: The government of Ahmad Tejan Kabbah declared Bengali as an honorary official language in December 2002. In 2009, elected representatives in both Bangladesh and West Bengal called for Bengali to be made an official language of the United Nations . Regional varieties in spoken Bengali constitute a dialect continuum . Linguist Suniti Kumar Chatterji grouped the dialects of Bengali language into four large clusters: Rarhi , Vangiya , Kamrupi and Varendri ; but many alternative grouping schemes have also been proposed. The south-western dialects ( Rarhi or Nadia dialect) form

10591-499: The graph মি [mi] represents the consonant [m] followed by the vowel [i] , where [i] is represented as the diacritical allograph ি (called ই-কার i-kar ) and is placed before the default consonant sign. Similarly, the graphs মা [ma] , মী [mi] , মু [mu] , মূ [mu] , মৃ [mri] , মে [me~mɛ] , মৈ [moj] , মো [mo] and মৌ [mow] represent the same consonant ম combined with seven other vowels and two diphthongs. In these consonant-vowel ligatures,

10710-412: The graphical form. However, since this change is not as widespread and is not being followed as uniformly in the rest of the Bengali printed literature, today's Bengali-learning children will possibly have to learn to recognise both the new "transparent" and the old "opaque" forms, which ultimately amounts to an increase in learning burden. Bengali punctuation marks, apart from the downstroke । daṛi –

10829-460: The human lineage) appeared in Africa at the very end of the Miocene, including Sahelanthropus , Orrorin , and an early form of Ardipithecus ( A. kadabba ). The chimpanzee–human divergence is thought to have occurred at this time. The evolution of bipedalism in apes at the end of the Miocene instigated an increased rate of faunal turnover in Africa. In contrast, European apes met their end at

10948-587: The lake levels of the Eastern Paratethys dropped as it once again became a sea. The Fram Strait opened during the Miocene and acted as the only throughflow for Atlantic Water into the Arctic Ocean until the Quaternary period. Due to regional uplift of the continental shelf, this water could not move through the Barents Seaway in the Miocene. The modern day Mekong Delta took shape after 8 Ma. Geochemistry of

11067-483: The language as: While most writing is in Standard Colloquial Bengali (SCB), spoken dialects exhibit a greater variety. People in southeastern West Bengal, including Kolkata, speak in SCB. Other dialects, with minor variations from Standard Colloquial, are used in other parts of West Bengal and western Bangladesh, such as the Midnapore dialect, characterised by some unique words and constructions. However,

11186-510: The language movement. Although Sanskrit has been spoken by Hindu Brahmins in Bengal since the 3rd century BC, the local Buddhist population spoke varieties of the Prakrit . These varieties are generally referred to as "eastern Magadhi Prakrit ", as coined by linguist Suniti Kumar Chatterji , as the Middle Indo-Aryan dialects were influential in the first millennium when Bengal

11305-535: The language. Major texts of Middle Bengali (1400–1800) include Yusuf-Zulekha by Shah Muhammad Sagir and Srikrishna Kirtana by the Chandidas poets. Court support for Bengali culture and language waned when the Mughal Empire conquered Bengal in the late 16th and early 17th century. The modern literary form of Bengali was developed during the 19th and early 20th centuries based on the west-central dialect spoken in

11424-428: The letter ত tô and the numeral ৩ "3" are distinguishable only by the presence or absence of the matra , as is the case between the consonant cluster ত্র trô and the independent vowel এ e , also the letter হ hô and Bengali Ôbogroho ঽ (~ô) and letter ও o and consonant cluster ত্ত ttô . The letter-forms also employ the concepts of letter-width and letter-height (the vertical space between

11543-585: The neighbouring states of Odisha , Bihar , and Jharkhand , and sizeable minorities of Bengali speakers reside in Indian cities outside Bengal, including Delhi , Mumbai , Thane , Varanasi , and Vrindavan . There are also significant Bengali-speaking communities in the Middle East , the United States , Singapore , Malaysia , Australia , Canada , the United Kingdom , and Italy . The 3rd article of

11662-543: The north, increasing precipitation over southern China whilst simultaneously decreasing it over Indochina during the EASM. Western Australia was at this time characterised by exceptional aridity. In Antarctica, average summer temperatures on land reached 10 °C. In the oceans, the lysocline shoaled by approximately half of a kilometre during warm phases that corresponded to orbital eccentricity maxima. The MMCO ended around 14 million years ago, when global temperatures fell in

11781-523: The origin of many modern genera such as Nerodia , Lampropeltis , Pituophis and Pantherophis ). Arthropods were abundant, including in areas such as Tibet where they have traditionally been thought to be undiverse. Neoisopterans diversified and expanded into areas they previously were absent from, such as Madagascar and Australia. In the oceans, brown algae , called kelp , proliferated, supporting new species of sea life, including otters , fish and various invertebrates . Corals suffered

11900-514: The parliament of Bangladesh and the legislative assembly of West Bengal proposed that Bengali be made an official UN language. As of January 2023, no further action has been yet taken on this matter. However, in 2022, the UN did adopt Bangla as an unofficial language, after a resolution tabled by India. In 2024, the government of India conferred Bengali with the status of classical language . Approximate distribution of native Bengali speakers (assuming

12019-463: The possible herpetotheriid Morotodon from the late Early Miocene of Uganda. Approximately 100 species of apes lived during this time , ranging throughout Africa, Asia and Europe and varying widely in size, diet, and anatomy. Due to scanty fossil evidence it is unclear which ape or apes contributed to the modern hominid clade, but molecular evidence indicates this ape lived between 18 and 13 million years ago. The first hominins ( bipedal apes of

12138-427: The so-called "inherent" vowel [ɔ] is first expunged from the consonant before adding the vowel, but this intermediate expulsion of the inherent vowel is not indicated in any visual manner on the basic consonant sign ম [mɔ] . The vowel graphemes in Bengali can take two forms: the independent form found in the basic inventory of the script and the dependent, abridged, allograph form (as discussed above). To represent

12257-695: The southernmost tip of Patagonia, meaning that the Chile Triple Junction lay near the Strait of Magellan . As the southern part of Nazca Plate and the Chile Rise became consumed by subduction the more northerly regions of the Antarctic Plate begun to subduct beneath Patagonia so that the Chile Triple Junction advanced to the north over time. The asthenospheric window associated to the triple junction disturbed previous patterns of mantle convection beneath Patagonia inducing an uplift of ca. 1 km that reversed

12376-536: The superposed chôndrôbindu (ঁ) , denoting a suprasegmental for nasalisation of vowels (as in চাঁদ [tʃãd] "moon"), the postposed ônusbar (ং) indicating the velar nasal [ŋ] (as in বাংলা [baŋla] "Bengali") and the postposed bisôrgô (ঃ) indicating the voiceless glottal fricative [h] (as in উঃ! [uh] "ouch!") or the gemination of the following consonant (as in দুঃখ [dukʰːɔ] "sorrow"). The Bengali consonant clusters ( যুক্তব্যঞ্জন juktôbênjôn ) are usually realised as ligatures, where

12495-467: The total population in Sylhet are Muslims, 7.33% are Hindus. There is a population of 2,700 Christians mainly in Gowainghat and Jaintiapur upazilas. Ethnic population is 16,508 (0.43%), of which 2834 were Manipuri , 1,845 Patro and 1,530 Khasi . Sylhet District is divided into thirteen upazilas . The upazilas are: Sylhet has a typical Bangladeshi tropical monsoon climate ( Köppen Am ) bordering on

12614-484: The visible matra and an invisible baseline). There is yet to be a uniform standard collating sequence (sorting order of graphemes to be used in dictionaries, indices, computer sorting programs, etc.) of Bengali graphemes. Experts in both Bangladesh and India are currently working towards a common solution for this problem. Throughout history, there have been instances of the Bengali language being written in different scripts, though these employments were never popular on

12733-435: The vocabulary may differ according to the speaker's religion: Muslims are more likely to use words of Persian and Arabic origin, along with more words naturally derived from Sanskrit ( tadbhava ), whereas Hindus are more likely to use tatsama (words directly borrowed from Sanskrit). For example: The phonemic inventory of standard Bengali consists of 29 consonants and 7 vowels, as well as 7 nasalised vowels . The inventory

12852-469: The warmer Oligocene to the cooler Pliocene Epoch. During the Early Miocene, Afro-Arabia collided with Eurasia, severing the connection between the Mediterranean and Indian Oceans, and allowing the interchange of fauna between Eurasia and Africa, including the dispersal of proboscideans and hominoids into Eurasia. During the late Miocene, the connections between the Atlantic and Mediterranean closed, causing

12971-650: The west coast of South America are thought to be caused by a regional phenomenon while the steadily rising central segment of the Andes represents an exception. While there are numerous registers of Oligocene–Miocene transgressions around the world it is doubtful that these correlate. It is thought that the Oligocene–Miocene transgression in Patagonia could have temporarily linked the Pacific and Atlantic Oceans, as inferred from

13090-423: Was Allodesmus . A ferocious walrus , Pelagiarctos may have preyed upon other species of pinnipeds including Allodesmus . Furthermore, South American waters witnessed the arrival of Megapiranha paranensis , which were considerably larger than modern age piranhas . New Zealand 's Miocene fossil record is particularly rich. Marine deposits showcase a variety of cetaceans and penguins , illustrating

13209-610: Was a gradual and progressive trend of increasing aridification, though it was not unidirectional, and wet humid episodes continued to occur. Between 7 and 5.3 Ma, temperatures dropped sharply again in the Late Miocene Cooling (LMC), most likely as a result of a decline in atmospheric carbon dioxide and a drop in the amplitude of Earth's obliquity, and the Antarctic ice sheet was approaching its present-day size and thickness. Ocean temperatures plummeted to near-modern values during

13328-554: Was a part of the Greater Magadhan realm. The local varieties had no official status during the Gupta Empire , and with Bengal increasingly becoming a hub of Sanskrit literature for Hindu priests, the vernacular of Bengal gained a lot of influence from Sanskrit. Magadhi Prakrit was also spoken in modern-day Bihar and Assam , and this vernacular eventually evolved into Ardha Magadhi . Ardha Magadhi began to give way to what

13447-573: Was approaching the western subduction zone in the Pacific Ocean , causing both the rise of the Andes and a southward extension of the Meso-American peninsula. Mountain building took place in western North America , Europe , and East Asia . Both continental and marine Miocene deposits are common worldwide with marine outcrops common near modern shorelines. Well studied continental exposures occur in

13566-509: Was arid, particularly so during the Middle Miocene. Climates remained moderately warm, although the slow global cooling that eventually led to the Pleistocene glaciations continued. Although a long-term cooling trend was well underway, there is evidence of a warm period during the Miocene when the global climate rivalled that of the Oligocene . The climate of the Miocene has been suggested as

13685-408: Was established on 3 January 1782, and until 1878 it was part of Bengal Province under Dhaka Division . However, in that year, Sylhet was moved to the newly created Assam Province , and it remained as part of Assam up to 1947 (except during the administrative reorganisation of Bengal Province between 1905 and 1912). Sylhet District was divided into five subdivisions and the current Sylhet District

13804-597: Was extensively developed during the Bengali Renaissance and is one of the most prolific and diverse literary traditions in Asia. The Bengali language movement from 1948 to 1956 demanding that Bengali be an official language of Pakistan fostered Bengali nationalism in East Bengal leading to the emergence of Bangladesh in 1971. In 1999, UNESCO recognised 21 February as International Mother Language Day in recognition of

13923-671: Was inversely correlated with carbon dioxide levels and global temperatures during the Miocene. Most modern lineages of diatoms appeared by the Late Miocene. There is evidence from oxygen isotopes at Deep Sea Drilling Program sites that ice began to build up in Antarctica about 36 Ma during the Eocene . Further marked decreases in temperature during the Middle Miocene at 15 Ma probably reflect increased ice growth in Antarctica. It can therefore be assumed that East Antarctica had some glaciers during

14042-468: Was known as the North Sylhet subdivision. In 1947, Sylhet became a part of East Pakistan as a result of a referendum (except 3 1 ⁄ 2 thanas of Karimganj subdivision ) as part of Chittagong Division . It was subdivided into four districts in 1983–84 with the current Sylhet District being known as North Sylhet. It became a part of Sylhet Division after its formation in 1995. Sylhet has played

14161-627: Was most intense there. Around this time the Mi3b glacial event (a massive expansion of Antarctic glaciers) occurred. The East Antarctic Ice Sheet (EAIS) markedly stabilised following the MMCT. The intensification of glaciation caused a decoherence of sediment deposition from the 405 kyr eccentricity cycle. The MMWI ended about 11 Ma, when the Late Miocene Cool Interval (LMCI) started. A major but transient warming occurred around 10.8-10.7 Ma. During

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