January 20, 2022

The United States, often the United States, is, in common parlance, simply an independent federal republic of America, comprising fifty member states and one federal district. The country is located in central North America, where its forty-eight states and its metropolitan district lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The state of Alaska is located in the northwestern part of the continent through Canada and the Bering Strait between Russia, while the state of Hawaii is an archipelago in the middle of the Pacific Ocean. The United States also owns associated states, overseas territories, and has a leased territory. With an area of ​​9.83 million square kilometers and a population of 331 million, the United States is the third largest and third most populous state in the world. The United States is home to one of the most nationally and culturally diverse societies in the world, thanks to its large number of immigrants. Its economy is outstanding among the world's countries, accounting for about one-fifth of the world's GDP. Its military, economic, cultural, and political influence grew most in the 19th and 20th centuries. After the break-up of the Soviet Union, the United States remained the only superpower, the world’s most significant economic and military superpower, until the international prestige and economic power of China, India, Russia, and other countries grew significantly.



In terms of natural geography, the United States is divided into the following major landscapes and major landscape groups: Appalachian MountainsNW-SE striking mountains in the eastern part of the continent, which is divided into two parts by the Hudson River. The northern part is part of the Caledonian and the southern part is part of the Variscan Mountains. The first stage in the formation of the Caledonian Mountains, which falls within the territory of the United States, are sedimentary mountains formed during wrinkling. Then, mainly in the north, granite intrusions formed (Newfoundland, New-Brunswick). During the formation of the Variscan Mountains, four parallel ranges of the Southern Appalachian formed, consisting of sedimentary rocks in the west and more crystalline rocks in the east. Inland or Central PlainsThe central part of the country is dominated by plains covered with marine sediments. The Five Lakes Region or the Great Lakes Region There are five huge lakes connected here, forming a real little sea: Upper Lake Lake Huron Lake Michigan Lake Erie Lake Ontario In addition, members of the countryside are characterized by the formation of sediments, sometimes sloping, and the rupture of layers in layers, leading to the formation of magnificent landscapes such as Niagara Falls, Niagara Falls. As a result of the ice age, moraine ranges have developed here (for example, in Oak Ridge, Tennessee). In the northern part of the Mississippi Basin, there are mainly moraines on the surface, and in the south it is mainly loess. The ice cover of the Pleistocene Age stretched to the line of Missouri and Ohio (a tributary of Mississippi) during the toughest ice age. The prairie board rises slightly to the west, but being a very large area, there is a difference in height of 1000 meters in some places between the two “edges”. Most of its Cretaceous sediment covers its monotonous surface. In some places there are stratified steps and basalt volcanoes. The ice of the Pleistocene eroded its surface in some places, and melting rarely created 300-meter water washes. Its climate is still extreme today, so it is mostly covered with grass. Coastal plains in the south-east are bordered by the Gulf of Mexico and the Atlantic Ocean, and are covered by marine (tertiary) and river sediments. THE

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