Misplaced Pages

#627372

111-596: The New Hampshire State House , located in Concord at 107 North Main Street, is the state capitol building of New Hampshire . The capitol houses the New Hampshire General Court , Governor , and Executive Council . The building was constructed on a block framed by Park Street (named in honor of the architect, Stuart James Park) to the north, Main Street to the east, Capitol Street to the south, and North State Street to

222-553: A basaltic magma to a granitic magma, but the quantities produced are small. For example, granitic rock makes up just 4% of the exposures in the South Sandwich Islands . In continental arc settings, granitic rocks are the most common plutonic rocks, and batholiths composed of these rock types extend the entire length of the arc. There are no indication of magma chambers where basaltic magmas differentiate into granites, or of cumulates produced by mafic crystals settling out of

333-504: A center for politics, law, healthcare, and insurance companies . Concord is located in south-central New Hampshire at 43°12′24″N 71°32′17″W  /  43.20667°N 71.53806°W  / 43.20667; -71.53806 (43.2070, −71.5371). It is 38 miles (61 km) north of the Massachusetts border, 40 miles (64 km) west of the Maine border, 54 miles (87 km) east of

444-402: A day between Boston and Concord. Since then, there has not been any passenger rail service to Concord. In 2021, Amtrak announced their plan to implement new service between Boston and Concord by 2035. Local bus service is provided by Concord Area Transit (CAT), with three routes through the city. Regional bus service provided by Concord Coach Lines and Greyhound Lines is available from

555-520: A diapir it would expend far too much energy in heating wall rocks, thus cooling and solidifying before reaching higher levels within the crust. Fracture propagation is the mechanism preferred by many geologists as it largely eliminates the major problems of moving a huge mass of magma through cold brittle crust. Magma rises instead in small channels along self-propagating dykes which form along new or pre-existing fracture or fault systems and networks of active shear zones. As these narrow conduits open,

666-610: A granite that is derived from partial melting of metasedimentary rocks may have more alkali feldspar, whereas a granite derived from partial melting of metaigneous rocks may be richer in plagioclase. It is on this basis that the modern "alphabet" classification schemes are based. The letter-based Chappell & White classification system was proposed initially to divide granites into I-type (igneous source) granite and S-type (sedimentary sources). Both types are produced by partial melting of crustal rocks, either metaigneous rocks or metasedimentary rocks. I-type granites are characterized by

777-565: A high content of sodium and calcium, and by a strontium isotope ratio, Sr/ Sr, of less than 0.708. Sr is produced by radioactive decay of Rb, and since rubidium is concentrated in the crust relative to the mantle, a low ratio suggests origin in the mantle. The elevated sodium and calcium favor crystallization of hornblende rather than biotite. I-type granites are known for their porphyry copper deposits. I-type granites are orogenic (associated with mountain building) and usually metaluminous. S-type granites are sodium-poor and aluminum-rich. As

888-524: A huge gold-painted wooden war eagle looking to the left was raised in 1818. In 1957, it was replaced with an element-proof peace eagle statue looking to the right, with the original eagle given to the New Hampshire Historical Society . The capitol grounds occupy 2.6 acres (11,000 m) and are enclosed by a granite fence. No gate impedes the flow of visitors, as this is "the people's house". The following seven statues or memorials are on

999-457: A low terrace to the west of the river, with residential neighborhoods climbing hills to the west and extending southwards towards the town of Bow. To the east of the Merrimack, atop a 100-foot (30 m) bluff, is a flat, sandy plain known as Concord Heights, which has seen most of the city's commercial development since 1960. The eastern boundary of Concord (with the town of Pembroke ) is formed by

1110-820: A much higher proportion of clay with the Cecil soil series a prime example of the consequent Ultisol great soil group. Granite is a natural source of radiation , like most natural stones. Potassium-40 is a radioactive isotope of weak emission, and a constituent of alkali feldspar , which in turn is a common component of granitic rocks, more abundant in alkali feldspar granite and syenites . Some granites contain around 10 to 20 parts per million (ppm) of uranium . By contrast, more mafic rocks, such as tonalite, gabbro and diorite , have 1 to 5 ppm uranium, and limestones and sedimentary rocks usually have equally low amounts. Many large granite plutons are sources for palaeochannel -hosted or roll front uranium ore deposits , where

1221-536: A peculiar mineralogy and geochemistry, with particularly high silicon and potassium at the expense of calcium and magnesium and a high content of high field strength cations (cations with a small radius and high electrical charge, such as zirconium , niobium , tantalum , and rare earth elements .) They are not orogenic, forming instead over hot spots and continental rifting, and are metaluminous to mildly peralkaline and iron-rich. These granites are produced by partial melting of refractory lithology such as granulites in

SECTION 10

#1732876051628

1332-681: A popular building material for many monumental halls in the early United States, and Concord granite was used in the construction of both the New Hampshire State House and the Library of Congress in Washington, D.C. In 1828, Lewis Downing joined J. Stephens Abbot to form Abbot and Downing . Their most famous product was their Concord coach , widely used in the development of the American West , and their enterprise largely boosted and changed

1443-711: A private preparatory school ; NHTI , a two-year community college ; the New Hampshire Police Academy; and the New Hampshire Fire Academy. Concord's Old North Cemetery is the final resting place of Franklin Pierce , 14th President of the United States . Interstate 89 and Interstate 93 are the two main interstate highways serving the city, and general aviation access is via Concord Municipal Airport . The nearest airport with commercial air service

1554-568: A range of hills, formed by the metamorphic aureole or hornfels . Granite often occurs as relatively small, less than 100 km stock masses ( stocks ) and in batholiths that are often associated with orogenic mountain ranges. Small dikes of granitic composition called aplites are often associated with the margins of granitic intrusions . In some locations, very coarse-grained pegmatite masses occur with granite. Granite forms from silica-rich ( felsic ) magmas. Felsic magmas are thought to form by addition of heat or water vapor to rock of

1665-415: A result, they contain micas such as biotite and muscovite instead of hornblende. Their strontium isotope ratio is typically greater than 0.708, suggesting a crustal origin. They also commonly contain xenoliths of metamorphosed sedimentary rock, and host tin ores. Their magmas are water-rich, and they readily solidify as the water outgasses from the magma at lower pressure, so they less commonly make it to

1776-553: Is Manchester–Boston Regional Airport , 23 miles (37 km) to the south. Concord's downtown underwent a significant renovation between 2015 and 2016, during the city's "Complete Streets Improvement Project". At a proposed cost of $ 12 million, the project promised to deliver on categories of maintenance to aging infrastructure , improved accessibility , increased sustainability , a safer experience for walkers, bikers and motorists alike, and to stimulate economic growth in an increasingly idle downtown. The main infrastructural change

1887-536: Is Manchester–Boston Regional Airport , 23 miles (37 km) to the south. There has been no passenger rail service to Concord since 1981. Historically, the Boston and Maine Railroad served the city. The area that would become Concord was originally settled thousands of years ago by Abenaki Native Americans called the Pennacook . The tribe fished for migrating salmon , sturgeon , and alewives with nets strung across

1998-466: Is grus , which is often made up of coarse-grained fragments of disintegrated granite. Climatic variations also influence the weathering rate of granites. For about two thousand years, the relief engravings on Cleopatra's Needle obelisk had survived the arid conditions of its origin before its transfer to London. Within two hundred years, the red granite has drastically deteriorated in the damp and polluted air there. Soil development on granite reflects

2109-539: Is microgranite . The extrusive igneous rock equivalent of granite is rhyolite . Granitic rock is widely distributed throughout the continental crust . Much of it was intruded during the Precambrian age; it is the most abundant basement rock that underlies the relatively thin sedimentary veneer of the continents. Outcrops of granite tend to form tors , domes or bornhardts , and rounded massifs . Granites sometimes occur in circular depressions surrounded by

2220-517: Is 3–6·10 Pa·s. The melting temperature of dry granite at ambient pressure is 1215–1260 °C (2219–2300 °F); it is strongly reduced in the presence of water, down to 650 °C at a few hundred megapascals of pressure. Granite has poor primary permeability overall, but strong secondary permeability through cracks and fractures if they are present. A worldwide average of the chemical composition of granite, by weight percent, based on 2485 analyses: The medium-grained equivalent of granite

2331-636: Is an average of 12 days of 90 °F (32 °C)+ highs annually. The window for freezing temperatures on average begins on September 27 and expires on May 14. The monthly daily average temperature range from 20.6 °F (−6.3 °C) in January to 70.0 °F (21.1 °C) in July. Temperature extremes have ranged from −37 °F (−38 °C) in February 1943 to 102 °F (39 °C) in July 1966. See or edit raw graph data . U.S. Decennial Census As of

SECTION 20

#1732876051628

2442-410: Is an excess of aluminum beyond what can be taken up in feldspars (Al 2 O 3 > CaO + K 2 O + Na 2 O) are described as peraluminous , and they contain aluminum-rich minerals such as muscovite . The average density of granite is between 2.65 and 2.75 g/cm (165 and 172 lb/cu ft), its compressive strength usually lies above 200 MPa (29,000 psi), and its viscosity near STP

2553-618: Is believed to have a mass of around 81 tonnes. It was the tallest temple in south India. Imperial Roman granite was quarried mainly in Egypt, and also in Turkey, and on the islands of Elba and Giglio . Granite became "an integral part of the Roman language of monumental architecture". The quarrying ceased around the third century AD. Beginning in Late Antiquity the granite was reused, which since at least

2664-434: Is called a binary or two-mica granite. Two-mica granites are typically high in potassium and low in plagioclase, and are usually S-type granites or A-type granites, as described below . Another aspect of granite classification is the ratios of metals that potentially form feldspars. Most granites have a composition such that almost all their aluminum and alkali metals (sodium and potassium) are combined as feldspar. This

2775-433: Is limited by the amount of thermal energy available, which must be replenished by crystallization of higher-melting minerals in the magma. Thus, the magma is melting crustal rock at its roof while simultaneously crystallizing at its base. This results in steady contamination with crustal material as the magma rises. This may not be evident in the major and minor element chemistry, since the minerals most likely to crystallize at

2886-417: Is lined with a balustrade separated by Corinthian columns supporting a pediment . Another balustrade lines the edge of the flat roof. The windows on the first floor are rectangular in shape, those on the second floor are arched, and those on the third floor are square panels. An octagonal drum with large arched windows supports a golden dome with bull's-eye windows and supporting a small lantern. A statue of

2997-489: Is made up of its downtown, including its North End and South End neighborhoods, plus the four distinct villages of Penacook , Concord Heights, East Concord, and West Concord. Concord, as with much of New England, is within the humid continental climate zone ( Köppen Dfb ), with long, cold, snowy winters, warm (and at times humid) summers, and relatively brief autumns and springs. In winter, successive storms deliver moderate to at times heavy snowfall amounts, contributing to

3108-404: Is permeated by sheets and channels of light granitic rock (the leucosome ). The leucosome is interpreted as partial melt of a parent rock that has begun to separate from the remaining solid residue (the melanosome). If enough partial melt is produced, it will separate from the source rock, become more highly evolved through fractional crystallization during its ascent toward the surface, and become

3219-454: Is relieved when overlying material is removed by erosion or other processes. Chemical weathering of granite occurs when dilute carbonic acid , and other acids present in rain and soil waters, alter feldspar in a process called hydrolysis . As demonstrated in the following reaction, this causes potassium feldspar to form kaolinite , with potassium ions, bicarbonate, and silica in solution as byproducts. An end product of granite weathering

3330-411: Is some concern that some granite sold as countertops or building material may be hazardous to health. Dan Steck of St. Johns University has stated that approximately 5% of all granite is of concern, with the caveat that only a tiny percentage of the tens of thousands of granite slab types have been tested. Resources from national geological survey organizations are accessible online to assist in assessing

3441-479: Is that magma will rise through the crust as a single mass through buoyancy . As it rises, it heats the wall rocks , causing them to behave as a power-law fluid and thus flow around the intrusion allowing it to pass without major heat loss. This is entirely feasible in the warm, ductile lower crust where rocks are easily deformed, but runs into problems in the upper crust which is far colder and more brittle. Rocks there do not deform so easily: for magma to rise as

New Hampshire State House - Misplaced Pages Continue

3552-622: Is the capital city of the U.S. state of New Hampshire and the seat of Merrimack County . As of the 2020 census the population was 43,976, making it the 3rd most populous city in New Hampshire after Manchester and Nashua . The area was first settled by Europeans in 1659. On January 17, 1725, the Province of Massachusetts Bay granted the Concord area as the Plantation of Penacook, and it

3663-410: Is the case when K 2 O + Na 2 O + CaO > Al 2 O 3 > K 2 O + Na 2 O. Such granites are described as normal or metaluminous . Granites in which there is not enough aluminum to combine with all the alkali oxides as feldspar (Al 2 O 3 < K 2 O + Na 2 O) are described as peralkaline , and they contain unusual sodium amphiboles such as riebeckite . Granites in which there

3774-587: Is the oldest state house in which the legislature meets in its original chambers. The building was remodeled in 1866, and the third story and west wing were added in 1910. Across from the State House is the Eagle Hotel on Main Street, which has been a downtown landmark since its opening in 1827. U.S. Presidents Ulysses S. Grant , Rutherford Hayes , and Benjamin Harrison all dined there, and Franklin Pierce spent

3885-455: Is typically orthoclase or microcline and is often perthitic . The plagioclase is typically sodium-rich oligoclase . Phenocrysts are usually alkali feldspar. Granitic rocks are classified according to the QAPF diagram for coarse grained plutonic rocks and are named according to the percentage of quartz , alkali feldspar ( orthoclase , sanidine , or microcline ) and plagioclase feldspar on

3996-428: Is uncommon, is classified simply as quartz-rich granitoid or, if composed almost entirely of quartz, as quartzolite . True granites are further classified by the percentage of their total feldspar that is alkali feldspar. Granites whose feldspar is 65% to 90% alkali feldspar are syenogranites , while the feldspar in monzogranite is 35% to 65% alkali feldspar. A granite containing both muscovite and biotite micas

4107-584: The Amoskeag Falls downriver, connecting Concord with Boston by way of the Middlesex Canal . In 1808, Concord was named the official seat of state government, and in 1816 architect Stuart Park was commissioned to design a new capitol building for the state legislature on land sold to the state by local Quakers . Construction on the State House was completed in 1819, and it remains the oldest capitol in

4218-546: The Boston and Maine Railroad . The former Concord Station was located at what is now a Burlington department store on Storrs Street. The station itself was built in 1860, but the fourth and most famous iteration of the station was built in 1885, which had a brick head house designed by Bradford L. Gilbert . The head house was demolished in 1959 and replaced by a smaller "McGinnis Era" station. By 1967, all passenger rail services to Concord had been discontinued. For 13 months in 1980 and 1981, MBTA Commuter Rail ran two round trips

4329-788: The McAuliffe-Shepard Discovery Center , a science museum named after Christa McAuliffe , the Concord teacher who died during the Space Shuttle Challenger disaster in 1986, and Alan Shepard , the Derry -born astronaut who was the second person and first American in space as well as the fifth and oldest person to walk on the Moon. Granite Granite is typical of a larger family of granitic rocks , or granitoids , that are composed mostly of coarse-grained quartz and feldspars in varying proportions. These rocks are classified by

4440-763: The New Hampshire Executive Council , Concord is in the 2nd District, represented by Cinde Warmington, the sole Democrat on the council. In the United States House of Representatives , Concord is in New Hampshire's 2nd congressional district , represented by Democrat Ann McLane Kuster . New Hampshire Department of Corrections operates the New Hampshire State Prison for Men and New Hampshire State Prison for Women in Concord. Concord leans strongly Democratic in presidential elections;

4551-545: The Revolution . The murals were painted by Barry Faulkner in 1942. Large curved tables surround the rostrum and are replicas of originals. The House Chamber houses the largest state legislative body in the United States , with 400 members. Large arched windows line the walls. On the rostrum hang portraits of John P. Hale , Abraham Lincoln , George Washington , Franklin Pierce , and Daniel Webster . The first session of

New Hampshire State House - Misplaced Pages Continue

4662-692: The Soucook River , a tributary of the Merrimack. The Turkey River winds through the southwestern quarter of the city, passing through the campus of St. Paul's School before entering the Merrimack River in Bow. In the northern part of the city, the Contoocook River enters the Merrimack at the village of Penacook. Concord is 16 miles (26 km) north of Manchester , New Hampshire's largest city, and 66 miles (106 km) north of Boston . The city of Concord

4773-632: The Vermont border, and 170 miles (270 km) south of the Canadian border at Pittsburg . According to the United States Census Bureau , the city has a total area of 67.2 square miles (174.0 km ). 64.0 square miles (165.7 km ) of it are land and 3.2 square miles (8.4 km ) of it are water, comprising 4.81% of the city. Concord is drained by the Merrimack River . Penacook Lake ,

4884-549: The census of 2020, there were 43,976 people residing in the city. The population density was 687.7 people per square mile (265.5 people/km ). At the 2010 Census there were 42,695 residents and 10,052 families in the city, as well as 18,852 housing units at an average density of 293.2 per square mile (113.2/km ). The racial makeup of the city in 2020 was 84.5% White , 4.9% Black or African American , 1.0% Native American , 4.9% Asian , 0.1% Pacific Islander , 0.4% from some other race , and 1.8% from two or more races. 4.9% of

4995-450: The legislature meets in its original chambers. Concord is entirely within the Merrimack River watershed and the city is centered on the river. The Merrimack runs from northwest to southeast through the city. The city's eastern boundary is formed by the Soucook River , which separates Concord from the town of Pembroke . The Turkey River passes through the southwestern quarter of the city. The city consists of its downtown , including

5106-567: The A-Q-P half of the diagram. True granite (according to modern petrologic convention) contains between 20% and 60% quartz by volume, with 35% to 90% of the total feldspar consisting of alkali feldspar . Granitic rocks poorer in quartz are classified as syenites or monzonites , while granitic rocks dominated by plagioclase are classified as granodiorites or tonalites . Granitic rocks with over 90% alkali feldspar are classified as alkali feldspar granites . Granitic rock with more than 60% quartz, which

5217-481: The Concord city charter , the mayor chairs the council, however has very few formal powers over the day-to-day management of the city. The actual operations of the city are overseen by the city manager , currently Thomas J. Aspell Jr. The current police chief is Bradley S. Osgood. In the New Hampshire Senate , Concord is in the 15th District, represented by Democrat Becky Whitley since December 2020. On

5328-481: The Concord Transportation Center at 30 Stickney Avenue next to Exit 14 on Interstate 93, with service south to Boston and points in between, as well as north to Littleton and northeast to Berlin . General aviation services are available through Concord Municipal Airport , located 2 miles (3 km) east of downtown. There is no commercial air service within the city limits; the nearest such airport

5439-400: The Concord area during campaign season. The city also developed an identity within the emerging space industry , with the McAuliffe-Shepard Discovery Center opening in 1990 to commemorate Alan Shepard , the first American in space from nearby Derry , and Christa McAuliffe , a teacher at Concord High School who died in the 1986 Space Shuttle Challenger disaster . Today, Concord remains

5550-598: The European Union safety standards (section 4.1.1.1 of the National Health and Engineering study) and radon emission levels well below the average outdoor radon concentrations in the US. Granite and related marble industries are considered one of the oldest industries in the world, existing as far back as Ancient Egypt . Major modern exporters of granite include China, India, Italy, Brazil, Canada, Germany, Sweden, Spain and

5661-628: The General Court began in 1819. The State House is the oldest state capitol in which both houses of the legislature meet in their original chambers. (The current chamber of the Massachusetts Senate is older but was originally used by the House of Representatives.) In 1814, discussion began about building a suitable building for the state capitol. The General Court debated three locations: Concord, Hopkinton , and Salisbury , which offered $ 7,000 to be

SECTION 50

#1732876051628

5772-625: The Governor and Council, the Secretary of State , the State Treasurer, and the State Library. During Meldrim Thomson Jr. 's governorship (1973–1979) the lights that shone on the State House's golden dome at night were turned off to save energy. This caused controversy because the illuminated dome had been an informal symbol of Concord for many years. With the help of several New Hampshire legislators,

5883-631: The Mohs hardness scale) , and tough. These properties have made granite a widespread construction stone throughout human history. The word "granite" comes from the Latin granum , a grain, in reference to the coarse-grained structure of such a completely crystalline rock. Granitic rocks mainly consist of feldspar , quartz , mica , and amphibole minerals , which form an interlocking, somewhat equigranular matrix of feldspar and quartz with scattered darker biotite mica and amphibole (often hornblende ) peppering

5994-630: The North End and South End neighborhoods, along with the four villages of Penacook , Concord Heights, East Concord, and West Concord. Penacook sits along the Contoocook River , just before it flows into the Merrimack. As of 2020, the top employer in the city was the State of New Hampshire, and the largest private employer was Concord Hospital . Concord is home to the University of New Hampshire School of Law , New Hampshire's only law school ; St. Paul's School ,

6105-448: The United States. The Red Pyramid of Egypt ( c.  2590 BC ), named for the light crimson hue of its exposed limestone surfaces, is the third largest of Egyptian pyramids . Pyramid of Menkaure , likely dating 2510 BC, was constructed of limestone and granite blocks. The Great Pyramid of Giza (c. 2580 BC ) contains a huge granite sarcophagus fashioned of "Red Aswan Granite". The mostly ruined Black Pyramid dating from

6216-500: The United States. The State Hospital continued to expand throughout the following decades, and in 1891 Concord Hospital opened its doors as Margaret Pillsbury General Hospital, the first general hospital in the state of New Hampshire. Concord's economy changed once again in the 20th century with the declining railroad and textile industry. The city developed into a center for national politics due to New Hampshire's first-in-the-nation primary, and many presidential candidates still visit

6327-419: The base of the chamber are the same ones that would crystallize anyway, but crustal assimilation is detectable in isotope ratios. Heat loss to the country rock means that ascent by assimilation is limited to distance similar to the height of the magma chamber. Physical weathering occurs on a large scale in the form of exfoliation joints , which are the result of granite's expanding and fracturing as pressure

6438-418: The big difference in rheology between mafic and felsic magmas makes this process problematic in nature. Granitization is an old, and largely discounted, hypothesis that granite is formed in place through extreme metasomatism . The idea behind granitization was that fluids would supposedly bring in elements such as potassium, and remove others, such as calcium, to transform a metamorphic rock into granite. This

6549-433: The capital. The legislature chose Concord as the location in 1816. Granite used to build the capitol came from the present-day Swenson quarries; the cutting, shaping and facing of the stone was performed by inmates of the state prison . The prison building was also constructed by Stuart Park. The cost of construction for the capitol was $ 82,000. The building was designed and built to house the General Court, its committees,

6660-513: The capitol. It houses the 24-member chamber. Large arched windows light the chamber. Behind the rostrum are large murals , arched like the windows, depicting events of the state's history . The mural to the left depicts the first commencement at Dartmouth College ; the next, Daniel Webster reading the United States Constitution ; after that, Abbott Thayer teaching his art class; and the last, John Stark preparing for battle in

6771-414: The city economy in the mid-19th century. In subsequent years, Concord would also become a hub for the railroad industry, with Penacook a textile manufacturing center using water power from the Contoocook River . The city also around this time started to become a center for the emerging healthcare industry, with New Hampshire State Hospital opening in 1842 as one of the first psychiatric hospitals in

SECTION 60

#1732876051628

6882-523: The city from east to west. State routes 13 and 132 also serve the city: Route 13 leads southwest out of Concord towards Goffstown and Milford , while Route 132 travels north parallel to Interstate 93. New Hampshire Route 106 passes through the easternmost part of Concord, crossing I-393 and NH 9 before crossing the Soucook River south into the town of Pembroke . To the north, NH 106 leads to Loudon , Belmont and Laconia . Historically, Concord served as an important railroad terminal and station for

6993-576: The city limits. Interstate 89 links Concord with Lebanon and the state of Vermont to the northwest, while Interstate 93 connects the city to Plymouth , Littleton , and the White Mountains to the north and Manchester and Boston to the south. Interstate 393 is a spur highway leading east from Concord and merging with U.S. Route 4 as a direct route to New Hampshire's Seacoast region . North-south U.S. Route 3 serves as Concord's Main Street, while U.S. Route 202 and New Hampshire Route 9 cross

7104-405: The council-manager system. The city council consists of a mayor and 14 councilors, ten of which are elected to two-year terms representing each of the city wards, while the other four are elected at-large to four-year terms. The mayor is elected directly every two years. The current mayor as of 2024 is Byron Champlin, who was elected on November 7, 2023, with more than 75% of the vote. According to

7215-404: The division between S-type (produced by underplating) and I-type (produced by injection and differentiation) granites, discussed below. The composition and origin of any magma that differentiates into granite leave certain petrological evidence as to what the granite's parental rock was. The final texture and composition of a granite are generally distinctive as to its parental rock. For instance,

7326-432: The downtown. Many power lines were buried, and street trees , colorful benches, art installations, and other green spaces were added, all allowing people to reclaim a space long dominated by cars. Main Street underwent serious traffic calming , including a road diet , increased diagonal parking, widening sidewalks, adding shared lane markings, adding trees, texturing medians and coloring crosswalks red. Another aspect of

7437-467: The early 16th century became known as spolia . Through the process of case-hardening , granite becomes harder with age. The technology required to make tempered metal chisels was largely forgotten during the Middle Ages. As a result, Medieval stoneworkers were forced to use saws or emery to shorten ancient columns or hack them into discs. Giorgio Vasari noted in the 16th century that granite in quarries

7548-420: The estimated median annual income for a household in the city was $ 52,695, and the median income for a family was $ 73,457. Male full-time workers had a median income of $ 49,228 versus $ 38,782 for females. The per capita income for the city was $ 29,296. About 5.5% of families and 10.1% of the population were below the poverty line , including 8.4% of those under age 18 and 5.5% of those age 65 or over. In 2020,

7659-573: The fall of 2002, brings independent films and filmmakers to Concord and has provided an outlet for local filmmakers to display their films. SNOB Film Festival was a catalyst for the building in 2007 of Red River Theatres, a locally owned, nonprofit, independent cinema named after the 1948 film featuring John Wayne. Other sites of interest include the Capitol Center for the Arts , the New Hampshire Historical Society , which has two facilities in Concord, and

7770-579: The first magma to enter solidifies and provides a form of insulation for later magma. These mechanisms can operate in tandem. For example, diapirs may continue to rise through the brittle upper crust through stoping , where the granite cracks the roof rocks, removing blocks of the overlying crust which then sink to the bottom of the diapir while the magma rises to take their place. This can occur as piecemeal stopping (stoping of small blocks of chamber roof), as cauldron subsidence (collapse of large blocks of chamber roof), or as roof foundering (complete collapse of

7881-684: The grotto is a highly regarded piece of Buddhist art , and along with the temple complex to which it belongs, Seokguram was added to the UNESCO World Heritage List in 1995. Rajaraja Chola I of the Chola Dynasty in South India built the world's first temple entirely of granite in the 11th century AD in Tanjore , India . The Brihadeeswarar Temple dedicated to Lord Shiva was built in 1010. The massive Gopuram (ornate, upper section of shrine)

7992-638: The grounds, installed at various times from 1886 to 1998: The main entrance opens into the Hall of Flags. The hall is designed after Charles Bulfinch 's design for the Massachusetts State House . The hall features 107 battle flags for New Hampshire representing the Civil War , Spanish–American War , World War I , World War II , and the Vietnam War . The Senate Chamber is located in the northeast corner of

8103-406: The largest lake in the city and its main source of water, is in the west. The highest point in Concord is 860 feet (260 m) above sea level on Oak Hill, just west of the hill's 970-foot (300 m) summit in neighboring Loudon . Concord lies fully within the Merrimack River watershed and is centered on the river, which runs from northwest to southeast through the city. Downtown is located on

8214-513: The last Republican nominee to carry the city was then Vice President George H. W. Bush in 1988. Voter turnout was 72.7% in the 2020 general election, down from 76.2% in 2016, but still above the 2020 national turnout of 66.7%. Newspapers and journals Radio The city is otherwise served by Manchester area stations . New Hampshire Public Radio is headquartered in Concord. Television The New Hampshire State House , designed by architect Stuart Park and constructed between 1815 and 1818,

8325-570: The lighter color minerals. Occasionally some individual crystals ( phenocrysts ) are larger than the groundmass , in which case the texture is known as porphyritic . A granitic rock with a porphyritic texture is known as a granite porphyry . Granitoid is a general, descriptive field term for lighter-colored, coarse-grained igneous rocks. Petrographic examination is required for identification of specific types of granitoids. Granites can be predominantly white, pink, or gray in color, depending on their mineralogy . The alkali feldspar in granites

8436-461: The lights were activated again in the first days of Hugh Gallen 's first term as governor. In 2016 the gold dome was regilded with 24 karat leafing, a process that has occurred several times over the history of the building. The 2016 project cost $ 2.8 million. 43°12′24″N 71°32′17″W  /  43.206748°N 71.538127°W  / 43.206748; -71.538127 Concord, New Hampshire Concord ( / ˈ k ɒ ŋ k ər d / )

8547-474: The lower crust , rather than by decompression of mantle rock, as is the case with basaltic magmas. It has also been suggested that some granites found at convergent boundaries between tectonic plates , where oceanic crust subducts below continental crust, were formed from sediments subducted with the oceanic plate. The melted sediments would have produced magma intermediate in its silica content, which became further enriched in silica as it rose through

8658-697: The lower continental crust at high thermal gradients. This leads to significant extraction of hydrous felsic melts from granulite-facies resitites. A-type granites occur in the Koettlitz Glacier Alkaline Province in the Royal Society Range, Antarctica. The rhyolites of the Yellowstone Caldera are examples of volcanic equivalents of A-type granite. M-type granite was later proposed to cover those granites that were clearly sourced from crystallized mafic magmas, generally sourced from

8769-435: The magma is inevitable once enough magma has accumulated. However, the question of precisely how such large quantities of magma are able to shove aside country rock to make room for themselves (the room problem ) is still a matter of research. Two main mechanisms are thought to be important: Of these two mechanisms, Stokes diapirism has been favoured for many years in the absence of a reasonable alternative. The basic idea

8880-426: The magma. Other processes must produce these great volumes of felsic magma. One such process is injection of basaltic magma into the lower crust, followed by differentiation, which leaves any cumulates in the mantle. Another is heating of the lower crust by underplating basaltic magma, which produces felsic magma directly from crustal rock. The two processes produce different kinds of granites, which may be reflected in

8991-408: The magmatic parent of granitic rock. The residue of the source rock becomes a granulite . The partial melting of solid rocks requires high temperatures and the addition of water or other volatiles which lower the solidus temperature (temperature at which partial melting commences) of these rocks. It was long debated whether crustal thickening in orogens (mountain belts along convergent boundaries )

9102-405: The mantle. Although the fractional crystallisation of basaltic melts can yield small amounts of granites, which are sometimes found in island arcs, such granites must occur together with large amounts of basaltic rocks. H-type granites were suggested for hybrid granites, which were hypothesized to form by mixing between mafic and felsic from different sources, such as M-type and S-type. However,

9213-409: The most expensive offenders, the budget ended up at $ 14.2 million, with the project actually coming in $ 1.1 million below that. Although adding final aesthetic touches with the extra money were debated, the city council ended up deciding to save for financially straining years ahead. The design was carried out by McFarland Johnson, IBI Group, and City of Concord Engineering. Concord is governed via

9324-538: The nation in which the state's legislative branches meet in their original chambers. Concord was also named the seat of Merrimack County in 1823, and the Merrimack County Courthouse was constructed in 1857 in the North End at the site of the Old Town House. In the early 19th century, much of the city's economy was dominated by furniture -making, printing, and granite quarrying ; granite had become

9435-505: The new construction was adding heated sidewalk capabilities, utilizing excess steam from the local Concord Steam plant, and minimizing sand and snow blowing needed during the winter months. Funding for Complete Streets came from a combination of $ 4,710,000 from a USDOT TIGER grant and the rest from the City of Concord. The project was initially proposed as costing $ 7,850,000, but ran over budget due to overambitious ideas. After scrapping some of

9546-453: The night before departing for his inauguration. Other well-known guests included Jefferson Davis , Charles Lindbergh , Eleanor Roosevelt , Richard M. Nixon (who carried New Hampshire in all three of his presidential bids), and Thomas E. Dewey . The hotel closed in 1961. South from the Eagle Hotel on Main Street is Phenix Hall, which replaced "Old" Phenix Hall, which burned in 1893. Both

9657-674: The north end of Main Street is the Pierce Manse , in which President Franklin Pierce lived in Concord before and following his presidency. The mid-1830s Greek Revival house was moved from Montgomery Street to North Main Street in 1971 to prevent its demolition. Beaver Meadow Golf Course, located in the northern part of Concord, is one of the oldest golf courses in New England. Besides this golf course, other important sporting venues in Concord include Everett Arena and Memorial Field. The SNOB (Somewhat North Of Boston) Film Festival, started in

9768-642: The old and new buildings featured multi-purpose auditoriums used for political speeches, theater productions, and fairs. Abraham Lincoln spoke at the old hall in 1860; Theodore Roosevelt , at the new hall in 1912. North on Main Street is the Walker-Woodman House, also known as the Reverend Timothy Walker House, the oldest standing two-story house in Concord. It was built for the Reverend Timothy Walker between 1733 and 1735. On

9879-441: The overlying crust. Early fractional crystallisation serves to reduce a melt in magnesium and chromium, and enrich the melt in iron, sodium, potassium, aluminum, and silicon. Further fractionation reduces the content of iron, calcium, and titanium. This is reflected in the high content of alkali feldspar and quartz in granite. The presence of granitic rock in island arcs shows that fractional crystallization alone can convert

9990-460: The population were Hispanic or Latino of any race. In 2010 there were 17,592 households, out of which 28.7% had children under the age of 18 living with them, 41.3% were headed by married couples living together, 11.6% had a female householder with no husband present, and 42.9% were non-families. 33.6% of all households were made up of individuals, and 12.0% were someone living alone who was 65 years of age or older. The average household size

10101-544: The rapids of the Merrimack River . The stream was also the transportation route for their birch bark canoes, which could travel from Lake Winnipesaukee to the Atlantic Ocean. The broad sweep of the Merrimack River valley floodplain provided good soil for farming beans , gourds , pumpkins , melons and maize . The area was first settled by Europeans in 1659 as Penacook, after the Abenaki word "pannukog" meaning "bend in

10212-702: The reign of Amenemhat III once had a polished granite pyramidion or capstone, which is now on display in the main hall of the Egyptian Museum in Cairo (see Dahshur ). Other uses in Ancient Egypt include columns , door lintels , sills , jambs , and wall and floor veneer. How the Egyptians worked the solid granite is still a matter of debate. Tool marks described by the Egyptologist Anna Serotta indicate

10323-420: The relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF classification ), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites ) contain almost no dark minerals. Granite is nearly always massive (lacking any internal structures), hard (falling between 6 and 7 on

10434-407: The relatively reliable snow cover. In addition, lows reach below 0 °F (−18 °C) on an average 15 nights per year, and the city straddles the border between USDA Hardiness Zone 5b and 6a. However, thaws are frequent, with one to three days per month with 50 °F (10 °C)+ highs from December to February. Summer can bring stretches of humid conditions as well as thunderstorms, and there

10545-551: The risk factors in granite country and design rules relating, in particular, to preventing accumulation of radon gas in enclosed basements and dwellings. A study of granite countertops was done (initiated and paid for by the Marble Institute of America) in November 2008 by National Health and Engineering Inc. of USA. In this test, all of the 39 full-size granite slabs that were measured for the study showed radiation levels well below

10656-612: The river," referencing the steep bends of the Merrimack River through the area. On January 17, 1725, the Province of Massachusetts Bay , which then claimed territories west of the Merrimack, granted the Concord area as the Plantation of Penacook. It was settled between 1725 and 1727 by Captain Ebenezer Eastman and others from Haverhill, Massachusetts . On February 9, 1734, the town was incorporated as "Rumford", from which Sir Benjamin Thompson, Count Rumford , would take his title. It

10767-418: The rock's high quartz content and dearth of available bases, with the base-poor status predisposing the soil to acidification and podzolization in cool humid climates as the weather-resistant quartz yields much sand. Feldspars also weather slowly in cool climes, allowing sand to dominate the fine-earth fraction. In warm humid regions, the weathering of feldspar as described above is accelerated so as to allow

10878-414: The rocks often bear a close resemblance. Under these conditions, granitic melts can be produced in place through the partial melting of metamorphic rocks by extracting melt-mobile elements such as potassium and silicon into the melts but leaving others such as calcium and iron in granulite residues. This may be the origin of migmatites . A migmatite consists of dark, refractory rock (the melanosome ) that

10989-489: The roof of a shallow magma chamber accompanied by a caldera eruption.) There is evidence for cauldron subsidence at the Mt. Ascutney intrusion in eastern Vermont. Evidence for piecemeal stoping is found in intrusions that are rimmed with igneous breccia containing fragments of country rock. Assimilation is another mechanism of ascent, where the granite melts its way up into the crust and removes overlying material in this way. This

11100-420: The site of Pennacook Falls. Concord grew in prominence throughout the 18th century, and some of the earliest houses from this period survive at the northern end of Main Street . In the years following the Revolution , Concord's central geographical location made it a logical choice for the state capital, particularly after Samuel Blodget in 1807 opened a canal and lock system to allow vessels passage around

11211-435: The surface than magmas of I-type granites, which are thus more common as volcanic rock (rhyolite). They are also orogenic but range from metaluminous to strongly peraluminous. Although both I- and S-type granites are orogenic, I-type granites are more common close to the convergent boundary than S-type. This is attributed to thicker crust further from the boundary, which results in more crustal melting. A-type granites show

11322-498: The top employer in the city remained the State of New Hampshire, with over 6,000 employed workers, while the largest private employer was Concord Hospital, with just under 3,000 employees. According to the City of Concord's Comprehensive Annual Financial Report, the top 10 employers in the city for the Fiscal Year 2020 were: Interstate 89 and Interstate 93 are the two main interstate highways serving Concord, and join just south of

11433-502: The uranium washes into the sediments from the granite uplands and associated, often highly radioactive pegmatites. Cellars and basements built into soils over granite can become a trap for radon gas, which is formed by the decay of uranium. Radon gas poses significant health concerns and is the number two cause of lung cancer in the US behind smoking. Thorium occurs in all granites. Conway granite has been noted for its relatively high thorium concentration of 56±6 ppm. There

11544-599: The use of flint tools on finer work with harder stones, e.g. when producing the hieroglyphic inscriptions. Patrick Hunt has postulated that the Egyptians used emery , which has greater hardness. The Seokguram Grotto in Korea is a Buddhist shrine and part of the Bulguksa temple complex. Completed in 774 AD, it is an artificial grotto constructed entirely of granite. The main Buddha of

11655-509: The west. The current statehouse was designed in 1814, and paid for by the city of Concord . In 1816, local Quakers sold the lot where their meetinghouse was to the state of New Hampshire, and the building was built between 1816 and 1819 by architect Stuart Park. The building was built in the Greek Revival style with smooth granite blocks. The entrance is covered by a small projecting portico supported by Doric columns . The balcony above

11766-411: Was 2.26, and the average family size was 2.90. In the city, the population was spread out, with 20.7% under the age of 18, 9.3% from 18 to 24, 28.0% from 25 to 44, 28.2% from 45 to 64, and 13.8% who were 65 years of age or older. The median age was 39.4 years. For every 100 females, there were 98.5 males. For every 100 females age 18 and over, there were 96.9 males. For the period 2009–2011,

11877-473: Was incorporated on February 9, 1734, as the Town of Rumford. Governor Benning Wentworth gave the city its current name in 1765 following a boundary dispute with the neighboring town of Bow ; the name was meant to signify the new harmony between the two towns. In 1808, Concord was named the official seat of state government, and the State House was completed in 1819; it remains the oldest U.S. state capitol wherein

11988-469: Was reducing the four-lane street (two in each direction) to two lanes plus a turning lane in the center. The freed-up space would contribute to extra width for bikes to ride in either direction, increased curb size and an added median where there is no need for a turning lane. Concord opted to add shared lane markings for bikes, rather than a dedicated protected bike lane . By adding curb space, this project created new opportunities for pedestrians to enjoy

12099-473: Was renamed "Concord" in 1765 by Governor Benning Wentworth following a bitter boundary dispute between Rumford and the town of Bow ; the city name was meant to reflect the new concord, or harmony, between the disputant towns. Citizens displaced by the resulting border adjustment were given land elsewhere as compensation. In 1779, New Pennacook Plantation was granted to Timothy Walker Jr. and his associates at what would be incorporated in 1800 as Rumford, Maine ,

12210-405: Was sufficient to produce granite melts by radiogenic heating , but recent work suggests that this is not a viable mechanism. In-situ granitization requires heating by the asthenospheric mantle or by underplating with mantle-derived magmas. Granite magmas have a density of 2.4 Mg/m , much less than the 2.8 Mg/m of high-grade metamorphic rock. This gives them tremendous buoyancy, so that ascent of

12321-564: Was supposed to occur across a migrating front. However, experimental work had established by the 1960s that granites were of igneous origin. The mineralogical and chemical features of granite can be explained only by crystal-liquid phase relations, showing that there must have been at least enough melting to mobilize the magma. However, at sufficiently deep crustal levels, the distinction between metamorphism and crustal melting itself becomes vague. Conditions for crystallization of liquid magma are close enough to those of high-grade metamorphism that

#627372