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72-536: The Chuska Mountains ( Navajo : Chʼóshgai ) are an elongate range on the southwest Colorado Plateau and within the Navajo Nation whose highest elevations approach 10,000 feet. The range is about 80 by 15 km (50 by 10 miles). It trends north-northwest and is crossed by the state line between Arizona and New Mexico . The highlands are a dissected plateau , with an average elevation of about 2,740 m (8,990 ft), and subdued topography. The highest point

144-449: A Super Bowl had been carried in a Native American language. In 2013, the 1977 film Star Wars was translated into Navajo. It was the first major motion picture translated into any Native American language. On October 5, 2018, an early beta of a Navajo course was released on Duolingo , a popular language learning app. After many Navajo schools were closed during World War II, a program aiming to provide education to Navajo children

216-503: A glottalic initiation . Navajo also has a simple glottal stop used after vowels, and every word that would otherwise begin with a vowel is pronounced with an initial glottal stop. Consonant clusters are uncommon, aside from frequent placing /d/ or /t/ before fricatives . The language has four vowel qualities: /a/ , /e/ , /i/ , and /o/ . Each exists in both oral and nasalized forms, and can be either short or long. Navajo also distinguishes for tone between high and low, with

288-421: A monoclinic crystal system , with tabular to prismatic crystals with an obvious pinacoid termination. It has four prism faces and two pinacoid faces to form a pseudohexagonal crystal. Although not easily seen because of the cleavage and sheets, fracture is uneven. It appears greenish to brown or black, and even yellow when weathered . It can be transparent to opaque, has a vitreous to pearly luster , and

360-541: A root to identify the action and the semblance of a suffix to convey mode and aspect ; however, this suffix is fused beyond separability. The stem is given somewhat more transparent prefixes to indicate, in this order, the following information: postpositional object, postposition, adverb-state, iterativity , number , direct object , deictic information, another adverb-state, mode and aspect, subject, classifier (see later on), mirativity and two-tier evidentiality . Some of these prefixes may be null; for example, there

432-449: A subject–object–verb language. However, some speakers order the subject and object based on "noun ranking". In this system, nouns are ranked in three categories—humans, animals, and inanimate objects—and within these categories, nouns are ranked by strength, size, and intelligence. Whichever of the subject and object has a higher rank comes first. As a result, the agent of an action may be syntactically ambiguous. The highest rank position

504-491: A "j" despite his personal objections. The Navajo refer to themselves as the Diné ('People'), with their language known as Diné bizaad ('People's language') or Naabeehó bizaad . Navajo is an Athabaskan language ; Navajo and Apache languages make up the southernmost branch of the family. Most of the other Athabaskan languages are located in Alaska, northwestern Canada, and along

576-491: A code based on Navajo. The language was considered ideal because of its grammar, which differs strongly from that of German and Japanese , and because no published Navajo dictionaries existed at the time. By the 1960s, Indigenous languages of the United States had been declining in use for some time. Native American language use began to decline more quickly in this decade as paved roads were built and English-language radio

648-484: A fairly high percentage overall but less than among other Americans speaking a different Native American language (85.4 percent). Navajo was the only Native American language afforded its own category in the survey; domestic Navajo speakers represented 46.4 percent of all domestic Native language speakers (only 195,407 Americans have a different home Native language). As of July 2014, Ethnologue classes Navajo as "6b" (In Trouble), signifying that few, but some, parents teach

720-483: A fairly large phonemic inventory, including several consonants that are not found in English. Its four basic vowel qualities are distinguished for nasality , length , and tone . Navajo has both agglutinative and fusional elements: it uses affixes to modify verbs, and nouns are typically created from multiple morphemes, but in both cases these morphemes are fused irregularly and beyond easy recognition. Basic word order

792-468: A grey-white streak . When biotite crystals are found in large chunks, they are called "books" because they resemble books with pages of many sheets. The color of biotite is usually black and the mineral has a hardness of 2.5–3 on the Mohs scale of mineral hardness . Biotite dissolves in both acid and alkaline aqueous solutions , with the highest dissolution rates at low pH . However, biotite dissolution

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864-504: A healthy speaker base, although this problem has been alleviated to some extent by extensive education programs in the Navajo Nation. In World War II, speakers of the Navajo language joined the military and developed a code for sending secret messages. These code talkers ' messages are widely credited with saving many lives and winning some of the most decisive battles in the war. Navajo has

936-400: A hexagonal sheet. The remaining oxygen ion (the apical oxygen ion) is available to bond with the octahedral sheet. The octahedral sheet in biotite is a trioctahedral sheet having the structure of a sheet of the mineral brucite , with magnesium or ferrous iron being the usual cations. Apical oxygens take the place of some of the hydroxyl ions that would be present in a brucite sheet, bonding

1008-403: A major language dictionary published that same year, and continued to work on studying and documenting the language in major works for the next few decades. Today an AM radio station, KTNN , broadcasts in Navajo and English, with programming including music and NFL games; AM station KNDN broadcasts only in Navajo. When Super Bowl XXX was broadcast in Navajo in 1996, it was the first time

1080-521: A military word, code talkers used descriptive words. For example, the Navajo did not have a word for submarine , so they translated it as iron fish . These Navajo code talkers are widely recognized for their contributions to WWII. Major Howard Connor, 5th Marine Division Signal Officer stated, "Were it not for the Navajos, the Marines would never have taken Iwo Jima." Navajo lands were initially colonized by

1152-569: A minette sill , the reservoir rock of the Dineh-bi-Keyah field in the northwestern Chuska Mountains near Roof Butte. The sill is intruded into lower Pennsylvanian sedimentary rocks . The producing rock is both porous and fractured, and it is characterized by large poikilitic sanidine grains with inclusions of diopsidic augite and biotite: potassium-argon dating of the biotite yielded 25.7 million years. This pulse of magmatism at about 25 million years may have been accompanied by uplift of

1224-526: A mottled appearance caused by the distortion of the mineral's flexible lamellae during grinding of the thin section. Basal sections of biotite in thin section are typically approximately hexagonal in shape and usually appear isotropic under cross-polarized light. Like other micas, biotite has a crystal structure described as TOT-c , meaning that it is composed of parallel TOT layers weakly bonded to each other by cations ( c ). The TOT layers in turn consist of two tetrahedral sheets ( T ) strongly bonded to

1296-413: A trait of fusional languages. In general, Navajo verbs contain more morphemes than nouns do (on average, 11 for verbs compared to 4–5 for nouns), but noun morphology is less transparent. Depending on the source, Navajo is either classified as a fusional agglutinative or even polysynthetic language, as it shows mechanisms from all three. In terms of basic word order , Navajo has been classified as

1368-503: Is Roof Butte (36.4601° N, 109.0929° W) at 2,994 m (9,823 ft), near the northern end of the range in Arizona . Other high points include the satellite Beautiful Mountain at 2,861 m (9,386 ft) and Lukachukai Mountains at 2,885 m (9,465 ft), both also near the northern end, and Matthews Peak at 2,911 m (9,551 ft). The San Juan Basin borders the Chuskas on

1440-553: Is subject–object–verb , though it is highly flexible to pragmatic factors. Verbs are conjugated for aspect and mood , and given affixes for the person and number of both subjects and objects , as well as a host of other variables. The language's orthography , which was developed in the late 1930s, is based on the Latin script . Most Navajo vocabulary is Athabaskan in origin, as the language has been conservative with loanwords due to its highly complex noun morphology. The word Navajo

1512-459: Is M 3 (AlSi 3 O 10 )(OH) 2 . The remaining negative charge of the TOT layer is neutralized by the interlayer potassium ions. Because the hexagons in the T and O sheets are slightly different in size, the sheets are slightly distorted when they bond into a TOT layer. This breaks the hexagonal symmetry and reduces it to monoclinic symmetry. However, the original hexahedral symmetry is discernible in

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1584-518: Is an exonym : it comes from the Tewa word Navahu , which combines the roots nava ('field') and hu ('valley') to mean 'large field'. It was borrowed into Spanish to refer to an area of present-day northwestern New Mexico , and later into English for the Navajo tribe and their language. The alternative spelling Navaho is considered antiquated; even the anthropologist Berard Haile spelled it with

1656-553: Is an essential phenocryst in some varieties of lamprophyre . Biotite is occasionally found in large cleavable crystals, especially in pegmatite veins, as in New England , Virginia and North Carolina USA. Other notable occurrences include Bancroft and Sudbury , Ontario Canada. It is an essential constituent of many metamorphic schists , and it forms in suitable compositions over a wide range of pressure and temperature . It has been estimated that biotite comprises up to 7% of

1728-602: Is formed of sand dune deposits, and it appears to be a remnant of a huge Oligocene sand sea, the Chuska erg . The erg hypothesis is consistent with major exhumation of the central Colorado Plateau in the late Oligocene and early Miocene (e.g., from about 26 to 16 million years ago). If so, then major uplift of the central Colorado Plateau may postdate the Laramide orogeny. Minette of the Navajo Volcanic Field intruded and

1800-406: Is held by humans and lightning. Other linguists such as Eloise Jelinek consider Navajo to be a discourse configurational language , in which word order is not fixed by syntactic rules, but determined by pragmatic factors in the communicative context. In Navajo, verbs are the main elements of their sentences, imparting a large amount of information. The verb is based on a stem , which is made of

1872-524: Is highly anisotropic with crystal edge surfaces ( h k 0 ) reacting 45 to 132 times faster than basal surfaces ( 001 ). In thin section , biotite exhibits moderate relief and a pale to deep greenish brown or brown color, with moderate to strong pleochroism . Biotite has a high birefringence which can be partially masked by its deep intrinsic color. Under cross-polarized light , biotite exhibits extinction approximately parallel to cleavage lines, and can have characteristic bird's eye maple extinction ,

1944-417: Is mandatory: Béégashii cow sitį́. 3 . SUBJ -lie( 1 ). PERF Béégashii sitį́. cow 3.SUBJ-lie( 1 ).PERF 'The (one) cow lies.' Béégashii cow shitéézh. 3 . SUBJ -lie( 2 ). PERF Biotite Biotite is a common group of phyllosilicate minerals within the mica group, with the approximate chemical formula K(Mg,Fe) 3 AlSi 3 O 10 (F,OH) 2 . It

2016-529: Is most closely related to Western Apache , with which it shares a similar tonal scheme and more than 92 percent of its vocabulary, and to Chiricahua-Mescalero Apache . It is estimated that the Apachean linguistic groups separated and became established as distinct societies, of which the Navajo were one, somewhere between 1300 and 1525. Navajo is generally considered mutually intelligible with all other Apachean languages. The Apachean languages, of which Navajo

2088-520: Is one, are thought to have arrived in the American Southwest from the north by 1500, probably passing through Alberta and Wyoming. Archaeological finds considered to be proto-Navajo have been located in the far northern New Mexico around the La Plata, Animas and Pine rivers, dating to around 1500. In 1936, linguist Edward Sapir showed how the arrival of the Navajo people in the new arid climate among

2160-405: Is only a plural marker ( da/daa ) and no readily identifiable marker for the other grammatical numbers. Navajo does not distinguish strict tense per se; instead, an action's position in time is conveyed through mode, aspect, but also via time adverbials or context. Each verb has an inherent aspect and can be conjugated in up to seven modes. For any verb, the usitative and iterative modes share

2232-504: Is primarily a solid-solution series between the iron - endmember annite , and the magnesium -endmember phlogopite ; more aluminous end-members include siderophyllite and eastonite . Biotite was regarded as a mineral species by the International Mineralogical Association until 1998, when its status was changed to a mineral group . The term biotite is still used to describe unanalysed dark micas in

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2304-508: Is sometimes used for iron-rich biotite, but the term also refers to a flaky micaceous form of haematite , and the field term Lepidomelane for unanalysed iron-rich Biotite avoids this ambiguity. Biotite is also sometimes called "black mica" as opposed to "white mica" ( muscovite ) – both form in the same rocks , and in some instances side by side. Like other mica minerals, biotite has a highly perfect basal cleavage , and consists of flexible sheets, or lamellae , which easily flake off. It has

2376-548: Is the marker of the Continuative aspect (to play about). Navajo distinguishes between the first, second, third, and fourth persons in the singular, dual, and plural numbers. The fourth person is similar to the third person, but is generally used for indefinite, theoretical actors rather than defined ones. Despite the potential for extreme verb complexity, only the mode/aspect, subject, classifier, and stem are absolutely necessary. Furthermore, Navajo negates clauses by surrounding

2448-401: Is usually encoded directly in the verb through the use of various prefixes or aspects, though this is by no means mandatory. In the following example, the verb on the right is used with the plural prefix da- and switches to the distributive aspect. Some verbal roots encode number in their lexical definition (see classificatory verbs above). When available, the use of the correct verbal root

2520-600: The Defiance Uplift , they stand higher. They are capped by an erosional remnant of Chuska Sandstone , a unit locally more than 500 meters thick. The flat-lying Chuska Sandstone rests unconformably on Mesozoic rocks deformed in the Defiance monocline. Biotite in layers of altered volcanic ash within the Chuska Sandstone has yielded radiometric ages of 35 and 33 million years by argon-argon dating . The Chuska Sandstone

2592-642: The Spanish in the early seventeenth century, shortly after this area was annexed as part of the Spanish viceroyalty of New Spain . When the United States annexed these territories in 1848 following the Mexican–American War , the English-speaking settlers allowed Navajo children to attend their schools. In some cases, the United States established separate schools for Navajo and other Native American children. In

2664-416: The Chuskas. The Chuska Mountains are sparsely populated. Nearby settlements are small, including Crystal, New Mexico , Lukachukai, Arizona , and Toadlena, New Mexico . Trading posts at Crystal and at Two Grey Hills (about 10 km east of Toadlena), are associated with distinctive patterns used in Navajo rugs. A paved road, New Mexico State Road 134 , crosses the range through Narbona Pass. Narbona Pass

2736-718: The Defiance Uplift immediately to the southwest form one of the prominent uplifted highlands of the Colorado Plateau . The uplifted region is separated from the San Juan Basin to the east by the Defiance and associated monoclines . Relative uplift, basin subsidence, and monocline formation began in the early stages of the Laramide orogeny about 75 to 80 million years ago. Although the Chuska Mountains can be considered part of

2808-782: The Defiance-Chuska high in addition to the uplift during the Laramide orogeny. Helium -rich gas has been extracted from Devonian strata in the Dineh-bi-Keyah field. Additional economic resources have included uranium , mined from some of the Mesozoic strata, particularly from the Morrison Formation in the Lukachukai Mountains at the northwest end of the Chuska Mountains. 36°28′N 109°06′W  /  36.467°N 109.100°W  / 36.467; -109.100 Navajo language The language has struggled to keep

2880-530: The Navajo Agency of the Bureau of Indian Affairs , developed and published a practical orthography in 1937. It helped spread education among Navajo speakers. In 1943 the men collaborated on The Navajo Language , a dictionary organized by the roots of the language. In World War II , the United States military used speakers of Navajo as code talkers —to transmit top-secret military messages over telephone and radio in

2952-409: The Navajo language to relay secret messages. At the end of the war the code remained unbroken. The code used Navajo words for each letter of the English alphabet. Messages could be encoded and decoded by using a simple substitution cipher where the ciphertext was the Navajo word. Type two code was informal and directly translated from English into Navajo. If there was no word in Navajo to describe

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3024-574: The Navajo language, and no English, while five English language teachers instruct in the English language. Kindergarten and first grade are taught completely in the Navajo language, while English is incorporated into the program during third grade, when it is used for about 10% of instruction. According to the Navajo Nation Education Policies, the Navajo Tribal Council requests that schools teach both English and Navajo so that

3096-463: The Navajo word for "corn" is naadą́ą́ʼ , derived from two Proto-Athabaskan roots meaning "enemy" and "food", suggesting that the Navajo originally considered corn to be "food of the enemy" when they first arrived among the Pueblo people. During World Wars I and II, the U.S. government employed speakers of the Navajo language as Navajo code talkers . These Navajo soldiers and sailors used a code based on

3168-951: The North American Pacific coast. Most languages in the Athabaskan family have tones . However, this feature evolved independently in all subgroups; Proto-Athabaskan had no tones. In each case, tone evolved from glottalic consonants at the ends of morphemes; however, the progression of these consonants into tones has not been consistent, with some related morphemes being pronounced with high tones in some Athabaskan languages and low tones in others. It has been posited that Navajo and Chipewyan , which have no common ancestor more recent than Proto-Athabaskan and possess many pairs of corresponding but opposite tones, evolved from different dialects of Proto-Athabaskan that pronounced these glottalic consonants differently. Proto-Athabaskan diverged fully into separate languages c.  500 BC . Navajo

3240-498: The assistance of Sally Midgette (Navajo). This work is organized by root , the basis of Athabaskan languages. A 1991 survey of 682 preschoolers on the Navajo Reservation Head Start program found that 54 percent were monolingual English speakers, 28 percent were bilingual in English and Navajo, and 18 percent spoke only Navajo. This study noted that while the preschool staff knew both languages, they spoke English to

3312-492: The chance to establish their own bilingual education programs. However, qualified teachers who were fluent in Native languages were scarce, and these programs were largely unsuccessful. However, data collected in 1980 showed that 85 percent of Navajo first-graders were bilingual, compared to 62 percent of Navajo of all ages—early evidence of a resurgence of use of their traditional language among younger people. In 1984, to counteract

3384-469: The children most of the time. In addition, most of the children's parents spoke to the children in English more often than in Navajo. The study concluded that the preschoolers were in "almost total immersion in English". An American Community Survey taken in 2011 found that 169,369 Americans spoke Navajo at home—0.3 percent of Americans whose primary home language was not English. Of primary Navajo speakers, 78.8 percent reported they spoke English "very well",

3456-558: The children would remain bilingual, though their influence over the school systems was very low. A small number of preschool programs provided the Navajo immersion curriculum, which taught children basic Navajo vocabulary and grammar under the assumption that they have no prior knowledge in the Navajo language. Navajo has a fairly large consonant inventory. Its stop consonants exist in three laryngeal forms: aspirated , unaspirated, and ejective —for example, /tʃʰ/ , /tʃ/ , and /tʃʼ/ . Ejective consonants are those that are pronounced with

3528-504: The corn agriculturalists of the Pueblo area was reflected in their language by tracing the changing meanings of words from Proto-Athabaskan to Navajo. For example, the word * dè: , which in Proto-Athabaskan meant "horn" and "dipper made from animal horn", in Navajo became a-deeʼ, which meant "gourd" or "dipper made from gourd". Likewise, the Proto-Athabaskan word * ł-yəx̣s "snow lies on the ground" in Navajo became yas "snow". Similarly,

3600-543: The east, and typical elevations in nearby parts of that basin are near 1,800 m (5,900 ft). The eastern escarpment of the mountains is marked by slumps and landslides that extend out onto the western margin of the San Juan Basin. To the north, the Chuskas are separated from the Carrizo Mountains by Red Rock Valley, which is today commonly referred to as Red Valley. Major peaks of the Chuskas include: Much of

3672-585: The exposed continental crust. An igneous rock composed almost entirely of dark mica (biotite or phlogopite) is known as a glimmerite or biotitite . Biotite may be found in association with its common alteration product chlorite . The largest documented single crystals of biotite were approximately 7 m (75 sq ft) sheets found in Iveland , Norway. Biotite is used extensively to constrain ages of rocks, by either potassium-argon dating or argon–argon dating . Because argon escapes readily from

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3744-451: The field . Biotite was named by J.F.L. Hausmann in 1847 in honor of the French physicist Jean-Baptiste Biot , who performed early research into the many optical properties of mica . Members of the biotite group are sheet silicates . Iron , magnesium , aluminium , silicon , oxygen , and hydrogen form sheets that are weakly bound together by potassium ions . The term "iron mica"

3816-416: The language to their offspring and that concerted efforts at revitalization could easily protect the language. Navajo had a high population for a language in this category. About half of all Navajo people live on Navajo Nation land, an area spanning parts of Arizona , New Mexico , and Utah ; others are dispersed throughout the United States. Under tribal law, fluency in Navajo is mandatory for candidates to

3888-476: The language's historical decline, the Navajo Nation Council decreed that the Navajo language would be available and comprehensive for students of all grade levels in schools of the Navajo Nation . This effort was aided by the fact that, largely due to the work of Young and Morgan, Navajo is one of the best-documented Native American languages. In 1980 they published a monumental expansion of their work on

3960-657: The language, organized by word (first initial of vowel or consonant) in the pattern of English dictionaries, as requested by Navajo students. The Navajo Language: A Grammar and Colloquial Dictionary also included a 400-page grammar, making it invaluable for both native speakers and students of the language. Particularly in its organization of verbs, it was oriented to Navajo speakers. They expanded this work again in 1987, with several significant additions, and this edition continues to be used as an important text. The Native American language education movement has been met with adversity, such as by English-only campaigns in some areas in

4032-469: The late 1990s. However, Navajo-immersion programs have cropped up across the Navajo Nation. Statistical evidence shows that Navajo-immersion students generally do better on standardized tests than their counterparts educated only in English. Some educators have remarked that students who know their native languages feel a sense of pride and identity validation. Since 1989, Diné College , a Navajo tribal community college , has offered an associate degree in

4104-552: The late 19th century, it founded boarding schools, often operated by religious missionary groups. In efforts to acculturate the children, school authorities insisted that they learn to speak English and practice Christianity. Students routinely had their mouths washed out with lye soap as a punishment if they did speak Navajo. Consequently, when these students grew up and had children of their own, they often did not teach them Navajo, in order to prevent them from being punished. Robert W. Young and William Morgan , who both worked for

4176-530: The low tone typically regarded as the default. However, some linguists have suggested that Navajo does not possess true tones, but only a pitch accent system similar to that of Japanese . In general, Navajo speech also has a slower speech tempo than English does. Navajo is difficult to classify in terms of broad morphological typology : it relies heavily on affixes —mainly prefixes—like agglutinative languages, but these affixes are joined in unpredictable, overlapping ways that make them difficult to segment,

4248-645: The number of monolingual Navajo speakers have been in the decline, and most younger Navajo people are bilingual. Near the 1990s, many Navajo children have little to no knowledge in Navajo language, only knowing English. In 1968, U.S. President Lyndon B. Johnson signed the Bilingual Education Act , which provided funds for educating young students who are not native English speakers. The Act had mainly been intended for Spanish-speaking children—particularly Mexican Americans —but it applied to all recognized linguistic minorities. Many Native American tribes seized

4320-651: The office of the President of the Navajo Nation . Both original and translated media have been produced in Navajo. The first works tended to be religious texts translated by missionaries, including the Bible. From 1943 to about 1957, the Navajo Agency of the BIA published Ádahooníłígíí ("Events" ), the first newspaper in Navajo and the only one to be written entirely in Navajo. It was edited by Robert W. Young and William Morgan, Sr. (Navajo). They had collaborated on The Navajo Language ,

4392-450: The pseudohexagonal character of biotite crystals. Members of the biotite group are found in a wide variety of igneous and metamorphic rocks . For instance, biotite occurs in the lava of Mount Vesuvius and in the Monzoni intrusive complex of the western Dolomites . Biotite in granite tends to be poorer in magnesium than the biotite found in its volcanic equivalent, rhyolite . Biotite

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4464-503: The range is Navajo Nation Forest; ponderosa pine, spruce, and fir are among the important tree varieties. Trees there were cut and transported more than 75 km (about 50 miles) to the east to construct pueblos in Chaco Culture National Historical Park in the San Juan Basin as early as 974 A.D. Following a period of contentious debate, logging in the Chuskas was suspended in 1994. There has been discussion among

4536-575: The same stem, as do the progressive and future modes; these modes are distinguished with prefixes. However, pairs of modes other than these may also share the same stem, as illustrated in the following example, where the verb "to play" is conjugated into each of the five mode paradigms: The basic set of subject prefixes for the imperfective mode, as well as the actual conjugation of the verb into these person and number categories, are as follows. The remaining piece of these conjugated verbs—the prefix na- —is called an "outer" or "disjunct" prefix. It

4608-451: The subject of Navajo. This program includes language, literature, culture, medical terminology, and teaching courses and produces the highest number of Navajo teachers of any institution in the United States. About 600 students attend per semester. One major university that teaches classes in the Navajo language is Arizona State University . In 1992, Young and Morgan published another major work on Navajo: Analytical Lexicon of Navajo , with

4680-399: The tetrahedral sheets tightly to the octahedral sheet. Tetrahedral sheets have a strong negative charge, since their bulk composition is AlSi 3 O 10 . The trioctahedral sheet has a positive charge, since its bulk composition is M 3 (OH) 2 (M represents a divalent ion such as ferrous iron or magnesium) The combined TOT layer has a residual negative charge, since its bulk composition

4752-481: The tribal government about resuming logging at some future time. The forests of the Chuska Mountains and of the Defiance Uplift receive higher rainfall than the surrounding lowlands, and these highlands typically receive regular winter snowfall. Runoff from snowmelt and seasonal thunderstorms along the crest of the Chuskas generates more than half the surface water of the Navajo Nation . Canyons of Canyon de Chelly National Monument were cut by streams with headwaters in

4824-435: The two faces of a single octahedral sheet ( O ). It is the relatively weak ionic bonding between TOT layers that gives biotite its perfect basal cleavage. The tetrahedral sheets consist of silica tetrahedra, which are silicon ions surrounded by four oxygen ions. In biotite, one in four silicon ions is replaced by an aluminium ion. The tetrahedra each share three of their four oxygen ions with neighboring tetrahedra to produce

4896-559: The verb with the circum clitic doo= ... =da (e.g. mósí doo nitsaa da 'the cat is not big'). Dooda , as a single word, corresponds to English no . Nouns are not required to form a complete Navajo sentence. Besides the extensive information that can be communicated with a verb, Navajo speakers may alternate between the third and fourth person to distinguish between two already specified actors, similarly to how speakers of languages with grammatical gender may repeatedly use pronouns. Most nouns are not inflected for number, and plurality

4968-463: Was broadcast to tribal areas. Navajo was no exception, although its large speaker pool—larger than that of any other Native language in the United States—gave it more staying power than most. Adding to the language's decline, federal acts passed in the 1950s to increase educational opportunities for Navajo children had resulted in pervasive use of English in their schools. In more recent years,

5040-556: Was extruded through the Chuska Sandstone. Minette makes up the two highest points: Roof Butte and Matthews Peak. A maar complex, containing pyroclastic and extrusive minette, is exposed along New Mexico Highway 134 in Narbona Pass (Brand et al., 2008). Argon-argon dating of four minette samples at Narbona Pass yielded consistent ages of 25 million years. Very little oil has been produced in Arizona, and much of that production has come from

5112-762: Was funded in the 1950s, where the number of students quickly doubled in the next decade. The Navajo Nation operates Tséhootsooí Diné Bi'ólta', a Navajo language immersion school for grades K-8 in Fort Defiance, Arizona . Located on the Arizona-New Mexico border in the southeastern quarter of the Navajo Reservation , the school strives to revitalize Navajo among children of the Window Rock Unified School District . Tséhootsooí Diné Bi'ólta' has thirteen Navajo language teachers who instruct only in

5184-508: Was originally called Beesh Lichii'l Bigiizh (English: Copper Pass ), and was the location where Navajo warriors led by Narbona decisively defeated a Mexican slaving expedition under Captain Blas de Hinojos . Later it was renamed Washington Pass, after Colonel John M. Washington , who commanded a military expedition against the Navajo. Narbona was a Navajo headman killed in an encounter with Washington's troops in 1849. The Chuska Mountains and

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