Geography of North America - wikipedia Geography of North America Global view centered on North America North America is the third largest continent, and is also a portion of the second largest supercontinent if North and South America are combined into the Americas and Africa, Europe, and Asia are considered to be part of one supercontinent called Afro - Eurasia. With an estimated population of 460 million and an area of 24,346,000 km2 ( 9,400,000 mi2 ), the northernmost of the two continents of the Western Hemisphere is bounded by the Pacific Ocean on the west ; the Atlantic Ocean on the east ; the Caribbean Sea, Atlantic and Pacific oceans, and South America on the south ; and the Arctic Ocean on the north. The northern half of North America is sparsely populated and covered mostly by Canada, except for the northeastern portion, which is occupied by Greenland, and the northwestern portion, which is occupied by Alaska, the largest state of the U.S. The central and southern portions of the continent are represented by the United States, Mexico, and numerous smaller states primarily in Central America and in the Caribbean. The continent is delimited on the southeast by most geographers at the Darién watershed along the Colombia - Panama border, placing all of Panama within North America. Alternatively, a less common view would end North America at the man - made Panama Canal. Islands generally associated with North America include Greenland, the world 's largest island, and archipelagos and islands in the Caribbean. The terminology of the Americas is complex, but `` Anglo - America '' can describe Canada and the U.S., while `` Latin America '' comprises Mexico and the countries of Central America and the Caribbean, as well as the entire continent of South America. Natural features of North America include the northern portion of the American Cordillera, represented by the geologically new Rocky Mountains in the west ; and the considerably older Appalachian Mountains to the east. The north hosts an abundance of glacial lakes formed during the last glacial period, including the Great Lakes. North America 's major continental divide is the Great Divide, which runs north and south down through Rocky Mountains. The major watersheds all drain to the east : The Mississippi / Missouri and Rio Grande into the Gulf of Mexico, and St. Lawrence into the Atlantic. Climate is determined to a large extent by the latitude, ranging from Arctic cold in the north to tropical heat in the south. The western half of North America tends to have milder and wetter climate than other areas with equivalent latitude, although there are steppes ( known as `` prairies '' ) in the central and western portions, and deserts in the Southwestern United States of Arizona, Colorado, California, Nevada, New Mexico, Utah, Oklahoma, and Texas ; along with the Mexican states of Baja California, Baja California Sur, Sonora, Chihuahua, Coahuila, Nuevo Leon and Tamaulipas. The Blue Marble, NASA ; east more rain than west. Contents 1 Paleogeography 2 Physiography 3 Surface and climate 3.1 North America 's greatest snowfalls 3.2 Hydrography and Deserts 3.2. 1 River systems 4 Deserts 4.1 Climate and vegetation 5 Zoology 6 Mining and petroleum 6.1 Rocky Mountains 7 Agriculture and forestry 8 See also 9 References 10 Notes 11 External links 12 Bibliography Paleogeography The paleogeological origins of the `` basement '' rocks underlying North America. Age of the bedrock underlying North America, from red ( oldest ) to blue, green, yellow ( newest ). Seventy percent of North America is underlain by the Laurentia craton, which is exposed as the Canadian Shield in much of central and eastern Canada around the Hudson Bay, and as far south as the U.S. states of Michigan, Wisconsin, and Minnesota. The continental crust started to form 4 billion years ago ( Ga ), and six of the microcontinents collided to form the craton about 2 Ga. This core has been enlarged by plate tectonics, most notably between 1.8 and 1.65 Ga when a piece currently stretching from Arizona to Missouri fused with the south and west portion of the craton. The craton started to rift about 1.1 Ga, and the fissure ( now the Midcontinent Rift System ) ran between Kansas and Lake Superior before stopping, perhaps due to the Grenville collision in the east. Otherwise the craton has remained relatively stable, with some rocks dating from 2.5 to 4 Ga, including what may be the world 's oldest known rock : Specimens from the Nuvvuagittuq greenstone belt on the coast of the Hudson Bay have been dated to 4.38 Ga, though the dating methods are disputed. Periodic flooding by inland seas, most recently the Western Interior Seaway during the Cretaceous, caused the layer of sedimentary rock over the remainder of the craton. The Laurentia craton is the center of the Proterozoic supercontinent Rodinia in most models, and was also part of the later Laurussia, Pangea, and Laurasia supercontinents. Roughly 3 million years ago ( Ma ), the volcanic Isthmus of Panama formed between the North and South American continents creating a bridge over what was the Central American Seaway and allowing the migration of flora and fauna between the two landmasses in the Great American Interchange. Starting 2.58 Ma, the Quaternary glaciation covered much of the continent with ice, centered west of Hudson Bay, the floor of which is slowly rebounding after being depressed by the great weight of the ice. Glaciers descended the slopes of the Rocky Mountains and those of the Pacific Margin. Extensive glacial lakes, such as Glacial Lake Missoula, Bonneville, Lahontan, Agassiz, and Algonquin, formed by glacial melt water. `` Remnants of them are still visible in the Great Basin and along the edge of the Canadian Shield in the form of the Great Salt Lake, the Great Lakes, and the large lakes of west central Canada. '' The last glacial period of the current ice age caused a lowering of the sea level, exposing the Bering Land Bridge between Alaska and Siberia, which resulted in human migration from Asia to the Americas between 40,000 and 15,000 years ago. North American watersheds ( Atlantic, Arctic, Great Basin, & Pacific ) North America can also be divided into four great regions : Great Plains : stretching from the Gulf of Mexico to the Canadian Arctic ; the geologically young, mountainous west : including the Rocky Mountains, the Great Basin, California and Alaska ; the raised but relatively flat plateau of the Canadian Shield in the northeast ; the varied eastern region : including the Appalachian Mountains, the coastal plain of the Atlantic Seaboard, and the Florida peninsula. Mexico and its long plateaus and cordilleras fall largely in the western region, although the eastern coastal plain does extend south along the Gulf. North American Plate ( center top ) Caribbean Plate ( center ) Physiography North America may be divided into at least five major physiographic regions : Canadian Shield This is a geologically stable area of rock dating between 2.5 and 4 Gya that occupies most of the northeastern quadrant, including Greenland. Appalachian Mountains The Appalachians are an old and eroded system that formed about 300 Ma and extends from the Gaspé Peninsula to Alabama. Atlantic Coastal Plain The plain is a belt of lowlands widening to the south that extends from south New England to Mexico. Interior Lowlands The lowlands extend down the middle of the continent from the Mackenzie Valley to the Atlantic Coastal Plain, and include the Great Plains on the west and the agriculturally productive Interior Plains on the east. North American Cordillera The cordillera is a complex belt of mountains and associated plateaus and basins some of which were formed as recently as 100 -- 65 Ma, during the Cretaceous. The cordillera extend from Alaska into Mexico and includes two orogenic belts -- the Pacific Margin on the west and the Rocky Mountains on the east -- separated by a system of intermontane plateaus and basins. The Coastal Plain and the main belts of the North American Cordillera continue in the south in Mexico ( where the Mexican Plateau, bordered by the Sierra Madre Oriental and the Sierra Madre Occidental, is considered a continuation of the intermontane system ) to connect the Transverse Volcanic Range, a zone of high and active volcanic peaks south of Mexico City. The vast majority of North America is located on the North American Plate, centered on the Laurentia craton. Parts of California and western Mexico form the partial edge of the Pacific Plate ; the two plates meet along the San Andreas Fault. The southern portion of the Caribbean and parts of Central America compose the much smaller Caribbean Plate. The western mountains have split in the middle, into the main range of the Rockies and the Coast Ranges in California, Oregon, Washington, and British Columbia with the Great Basin ( a lower area containing smaller ranges and low - lying deserts ) in between. The highest peak is Mount McKinley / Denali in Alaska. The geographic center of North America is approximately `` 6 miles west of Balta, Pierce County, North Dakota '' at 480 10 ′ north, 1000 10 ′ west, and a 15 - foot ( 4.5 m ) field stone obelisk in Rugby, North Dakota ( ~ 15 miles or 25 km away ) claims to mark the center. Three countries ( Canada, the United States, and Mexico ) make up most of North America 's land mass ; they share the continent with 34 other island countries in the Caribbean and south of Mexico. Surface and climate The Great Plains The Great Plains is the broad expanse of prairie and steppe which lies east of the Rocky Mountains in the United States and Canada. The narrow plains in the Mexican coast and the savannas of the Mississippi are analogous to, respectively, the Patagonian steppes and the pampas of the Piranha, Paraguay, and Rio de la Plata. Thus the Appalachians and the mountain chains of Brazil are regarded as creating similar interruptions to the plains community. North America extends to within 10 ° of latitude of both the equator and the North Pole. It embraces every climatic zone, from tropical rain forest and savanna on the lowlands of Central America to areas of permanent ice cap in central Greenland. Subarctic and tundra climates prevail in north Canada and north Alaska, and desert and semiarid conditions are found in interior regions cut off by high mountains from rain - bearing westerly winds. However, most of the continent has temperate climates very favorable to settlement and agriculture. Prairies, or vast grasslands cover a huge amount in mountain ranges. North America 's greatest snowfalls Greatest Snowfalls Places Date Inches Centimeters 24 hours Silver Lake, Colorado April 14 -- 15, 1921 76 195.6 1 month Tamarack, California January 1911 390 991 One storm Mt. Shasta Ski Bowl, Calif. February 13 -- 19, 1959 189 480 One season Mount Baker, WA 1998 -- 1999 1, 140 2, 895.6 Hydrography and deserts See also : hydrography, evapotranspiration, surface runoff, and percolation The average rainfall in North America is 76 cm / year, which produces some 18 petaliters of water. River systems North American rivers include : Saint Lawrence River on the New York -- Ontario border The Upper Rio Grande by Creede, Colorado Approaching the Arctic Ocean Albany Churchill Mackenzie Nelson Severn Approaching the Atlantic Ocean Arkansas Churchill Connecticut Delaware Grijalva Hudson James Mississippi Missouri Ohio Potomac Rio Grande Saint John St. Johns St. Lawrence Savannah Susquehanna Tennessee Usumacinta The Columbia River from Canada to the Pacific Approaching the Pacific Ocean Balsas River Colorado Columbia Fraser Fuerte River Lerma River Sacramento San Joaquin Suchiate River Yukon Within the Great Basin Bear River Humboldt River Sevier River Deserts North America map of Köppen climate classification. The Sierra Nevada and Cascade mountain ranges run along the entire Pacific Coast, acting as a barrier to the humid winds that sweep in from the ocean. The rising topography forces this air upwards, causing moisture to condense and fall in the form of rain on the western slopes of the mountains, with some areas receiving more than 70 inches ( 1.8 m ) of rainfall per year. As a result, the air has lost much of its moisture and becomes hot and dry when it reaches the areas east of the coastal mountain ranges. These arid conditions are, in some instances, exacerbated in regions of extremely low altitude ( some near or below sea level ) by higher air pressure, resulting in drier conditions and adiabatic heating effects, some of these pocket deserts exist in valleys well north of the Canada -- US border in interior British Columbia. What precipitation does fall generally does not last long, lost primarily to evaporation, as well as rapid runoff and efficient water uptake and storage by native vegetation. Climate and vegetation There are various plant life distributions in North America. Plant life in the Arctic includes grasses, mosses, and Arctic willows. Coniferous trees, including spruces, pines, hemlocks, and firs, are indigenous to the Canadian and Western U.S. mountain ranges as far south as San Francisco. Among these are giant sequoias, redwoods, great firs, and sugar pines. Sugar pines are generally confined to the northwestern area of the United States. The central region of the country has hardwoods. Southern states grow extensive yellow pines. In addition, mahogany, logwood, and lignumvitae - all tropical in nature - are grown. The southwest has desert plants, including yucci and cacti. The cultivated native plants of North America are tobacco, maize, potato, vanilla, melons, cacao, gourds, indigo plant, and bean. Major habitat types of the United States and Canada Ecoregions map of Canada, United States and Mexico Zoology North America is home to many native mammal species. Several species of deer, including elk, caribou, moose, mule deer, and the abundant white - tailed deer are found throughout various regions, along with the bison and musk ox in the central and northern plains, respectively. Three species of bear, several subspecies of wolf, and various other carnivores such as raccoons, skunks, and cats including cougars and lynxes are widely distributed. The family Mustelidae is well represented, including badgers, otters, ferrets, and wolverines. Numerous species of squirrels and other rodents, such as beavers and muskrats, can be found in virtually every region of the continent. Central America has adapted sloths, anteaters, and armadillos. Other animals includes the condor, among the heights of the Andes, the parrots and the monkeys of Tropical forests, the humming bird, rattlesnake, alligator, and Cayman of the banks of the streams, and swarms of mosquitoes on the wide plains. Mining and petroleum The mining and petroleum industries are important in Canada, the United States and Mexico. These natural resources make the region one of the richest on the earth. Rocky Mountains Picture of Rocky Mountains The Rocky Mountain region is known for vast resources and rich mineral deposits including copper, lead, gold, silver, tungsten, uranium, and zinc. Coal, petroleum and natural gas are mineral fuels found. Old mine tailings are present in the Rocky Mountain landscape. Agriculture and forestry Agriculture and forestry are two major industries. Agriculture includes arid land and irrigated farming and livestock grazing. Livestock are often moved between high - elevation summer pastures and low - elevation and winter pastures. See also Geography portal North America portal Aruba portal Bahamas portal Barbados portal Belize portal British Virgin Islands portal Canada portal Costa Rica portal Cuba portal Dominican Republic portal El Salvador portal Greenland portal Grenada portal Guadeloupe portal Guatemala portal Haiti portal Jamaica portal Mexico portal Nicaragua portal Panama portal Puerto Rico portal Trinidad and Tobago portal United States portal Geography of North America Geography of Canada Geography of the Caribbean Geography of Anguilla Geography of Antigua and Barbuda Geography of Aruba Geography of Barbados Geography of Bonaire Geography of the British Virgin Islands Geography of the Cayman Islands Geography of Cuba Geography of Curaçao Geography of Dominica Geography of the Dominican Republic Geography of Grenada Geography of Guadeloupe Geography of Haiti Geography of Jamaica Geography of Martinique Geography of Montserrat Geography of Puerto Rico Geography of Saba Geography of Saint Barthélemy Geography of Saint Kitts and Nevis Geography of Saint Lucia Geography of Saint Martin Geography of Saint Vincent and the Grenadines Geography of Sint Eustatius Geography of Sint Maarten Geography of Trinidad and Tobago Geography of the United States Virgin Islands Geography of Central America Geography of Belize Geography of Costa Rica Geography of El Salvador Geography of Guatemala Geography of Honduras Geography of Nicaragua Geography of Panama Geography of Greenland Geography of the Lucayan Archipelago Geography of the Bahamas Geography of the Turks and Caicos Islands Geography of Mexico Geography of the United States Geology of North America List of mountain peaks of North America Transportation in North America References `` Deserts of America ''. The Golden Treasury of Knowledge. 4, book 13. Fratelli Fabbri. 1961. pp. 1008 -- 1091. 61 - 10594. access - date = requires url = ( help ) `` Geography of North America ''. Universal World Reference Encyclopedia. 11, book 1. V.S. Thatcher. 1964. pp. 231 -- 233. 64 - 12955. access - date = requires url = ( help ) Notes ^ Jump up to : `` Geographic Guide - Images of North America ''. Retrieved 2006 - 10 - 11. Jump up ^ `` Americas '' Standard Country and Area Codes Classifications ( M49 ), United Nations Statistics Division Jump up ^ `` North America '' Archived October 21, 2006, at the Wayback Machine. Atlas of Canada Jump up ^ North America Atlas National Geographic Jump up ^ `` United Plates of America ''. Smithsonian Museum of Natural History. Retrieved on 2009 - 01 - 31. Jump up ^ Thompson, Andrea ( 2008 - 09 - 25 ). `` Oldest rocks on Earth found ''. MSNBC. Retrieved 2009 - 02 - 01. Jump up ^ O'Neil, Jonathan ; Carlson, Richard W. ; Francis, Don ; Stevenson, Ross K. ( 2008 - 09 - 26 ). `` Neodymium - 142 Evidence for Hadean Mafic Crust ''. Science 321 ( 5897 ) : 1828 -- 1831. doi : 10.1126 / science. 1161925. Jump up ^ Brahic, Catherine ( 2008 - 09 - 26 ). `` Discovery of world 's oldest rocks challenged ''. NewScientist. Retrieved 2009 - 02 - 01. Jump up ^ `` Rodinia '' Archived 2009 - 02 - 18 at the Wayback Machine. ( 2005 ). Palæos. Retrieved on 2009 - 02 - 01. ^ Jump up to : Jones, Steve. `` North America 's Geology and Geography ''. USA Today. Retrieved 2006 - 08 - 19. Jump up ^ `` Historical & Cultural Significance '' ( 1995 ). Bering Land Bridge Natural Preserve. ^ Jump up to : `` Encyclozine - North America ''. Retrieved 2006 - 10 - 11. Jump up ^ `` Elevations and Distances in the United States ''. 1995. Archived from the original ( Online Edition ) on July 22, 2012. Retrieved 2009 - 02 - 05. No marked or monumented point has been established by any government agency as the geographic center of the 50 States, the conterminous United States, or the North American continent. ^ Jump up to : `` North America climate ''. Retrieved 2006 - 08 - 19. Jump up ^ `` Private Tutor ''. Infoplease.com. 2004 - 04 - 11. Retrieved 2010 - 06 - 30. Jump up ^ North America water resources. ^ Jump up to : `` Fact Monster - North America : Resources and Economy ''. Retrieved 2006 - 10 - 11. External links The Future for Water in North America Bibliography Map and aerial photos North America map Physical map Map of the Great Lakes North American map North America Political map Oldest Human Remains in North America Found T.H. Clark and C.W. Stearn, The Geological Evolution of North America ( 1968 ) W.P. Cumming et al., The Discovery of North America ( 1972 ) R.C. West et al., Middle America : Its Lands and Peoples ( 3d ed. 1989 ) T.L. McKnight, Regional Geography of the United States and Canada ( 1992 ) S. Birdsall, Regional Landscapes of the United States and Canada ( 4th rev. ed. 1992 ) T. Flannery, The Eternal Frontier : An Ecological History of North America and Its Peoples ( 2001 ) A. Taylor, American Colonies ( 2001 ). Geography of North America Sovereign states Antigua and Barbuda Bahamas Barbados Belize Canada Costa Rica Cuba Dominica Dominican Republic El Salvador Grenada Guatemala Haiti Honduras Jamaica Mexico Nicaragua Panama Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Trinidad and Tobago United States Dependencies and other territories Anguilla Aruba Bermuda Bonaire British Virgin Islands Cayman Islands Curaçao Greenland Guadeloupe Martinique Montserrat Navassa Island Puerto Rico Saint Barthélemy Saint Martin Saint Pierre and Miquelon Saba Sint Eustatius Sint Maarten Turks and Caicos Islands United States Virgin Islands North America articles History Settlement of the Americas Paleo - Indians Pre-Columbian era European colonization New Spain New France British North America Turtle Island Geography Cities Countries and dependent territories by population Extreme points Geology Islands Lakes Mountains Rivers Politics American imperialism North American Union ( NAU ) Organization of American States ( OAS ) Transatlantic relations Economy Caribbean Community ( CARICOM ) North American Free Trade Agreement ( NAFTA ) Transportation Countries by GDP ( per capita ) PPP per capita HDI Internet users Minimum wages Outline Portal Maps Retrieved from `` https://en.wikipedia.org/w/index.php?title=Geography_of_North_America&oldid=815791933 '' Categories : Geography of North America Water in North America Hidden categories : Webarchive template wayback links All articles with unsourced statements Articles with unsourced statements from April 2009 Articles with unsourced statements from February 2009 Pages using citations with accessdate and no URL Talk Contents About Wikipedia Español Français हिन्दी Polski Suomi Українська Zazaki Edit links This page was last edited on 17 December 2017, at 04 : 51. 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Question: what is a special geographic characteristic of central america
Answer: tropical rain forest