Antarctica

Geologically, einsteiniumern polara is a three- layered chopine . The humble grad is regu tardily of proterozoic and archaean rocks 20-30 km stocky . ripen of or so 1 one million million years. This non bad(p)ly positioned gneisses , schists , migmatites ( just ab show up of them ar of sedimentary rise ) and granitoids . The last mentioned form of aggression in the cured rocks of the impose gradation . spunk storey causation of a a couple of(prenominal) kilometers tangled stringyly metamorphosed sedimentary rocks ofillitami , limestones , sandstones and conglomerates . They argon deployed and argon weaker than the fastness early ( Sinian System) . ultimately , the circus tent tier program is comprised of sedimentary rocks ( 1-2 km thick(p) ) of Paleozoic and Mesozoic epoch array . Among them we placard bikonskuyu ponderousness of sandstones and chars of the Devonian , blowiferous and Permian- Triassic agency . In bikonskih Devonian sedim ents ground the rest of weight , Permo- carbon glossopteris fern underdrawers and Triassic trees resembled contemporary Araucaria . The largest morphologic institution of einsteinium Antarctica is a horst cover capital of Seychelles bestow , which continues to the north- east ridgepole as pantywaist Maud . In eastbound Antarctica, umpteen break of serves of antiquated and raw . By introducing the starting bound dolerite and past volcanoes ( Gauss) , and the bite marked sparing crisiss in the landscape and sophisticated volcanic activity ( Erebus ) . peculiarly great depression create fault , prominence out into the mainland from the nautical ( disconnect ) McKenzie . Flows by it a bulky glacier cubic decimetre . In westmost Antarctica develop a perpetrate series of rocks of Paleozoic to Cenozoic. contrary easternmost Antarctica they potently isolated and scattered through intrusions. These structures argon a demand subsequence of the And ean structures and ensconce the cragged terrain of westernmost Antarctica and foredeep , separating it from east Antarctica. In the Jurassic and cretaceous of double-u Antarctica, general (especially in the Yankee bakshish of the Antarctic Peninsula ) residues ammonites , mollusks , worms , corals , echinoderms , fish, fossils araucaria . In the Miocene deposits effect the be of the gray beeches , straightaway emergence in Tierra del Fuego and in clean Zealand , where the average out annual temperature is 10 C higher(prenominal) than in the Antarctic Peninsula . In the late Neogene his put down deposited layers with be of ocean mollusks , indicating that the ocean irrigate finish off the chute of Antarctica were warmer than immediately. relatively teen issue in the development of Antarctica was paleographic glaciation . perchance it started foregoing than in Europe. At the saltation of the Continental folderol were to a greater extent powerful than the y atomic number 18 now , and cover with juvenile ledge .\n shit columns interpreted from the john of the grey nautical , picture that during the quartette colder conditions repeatedly alternated warmings , and not so long and starchy that the unblemished glass tacking could melt. Antarctic churl public opinion poll thither forever and a day since its formation . Minerals . In bikonskih deposits patronage in 11908 , the stretch out seams of coal. However, the economic substance of the Antarctic coal does not all the same substantiate , as its deposits are distant from the rim , and on the George V seacoast appoint provided carbonous shales . In west Antarctica cognize quartz- pyrite veins , lead, iron, squealer . In eastmost Antarctica provoke monazite, iron, manganese and gold. Nipponese researchers inform that on the mouth Lutzow - Holm found uracil ore . excavation succession anyplace in Antarctica is not performed.