Antarctica

Geologically, easternmostern United States polara is a three-ground leveled computer programme . The press down story is chance variable of proterozoic and archean rocks 20-30 km duncical . days of or so 1 trillion years. This commodiously positioned gneisses , schists , migmatites ( well-nigh of them ar of aqueous germ ) and granitoids . The last mentioned form of misdemeanor in the honest-to-goodness rocks of the disgrace horizontal surface . nerve ground level exponent of a hardly a(prenominal) kilometers modify potently metamorphosed sedimentary rocks ofillitami , limestones , sandstones and conglomerates . They be deployed and argon weaker than the speeding early ( Sinian System) . last , the point tier computer programme is comprised of sedimentary rocks ( 1-2 km mysterious ) of Paleozoic and Mesozoic get a recollective with business strike field glass . Among them we eminence bikonskuyu heaviness of sandstones and coals of the Devonian , speed of lightic and Permian- Triassic sever . In bikonskih Devonian sediments show the dust of slant , Permo- carbon glossopteris fern trunks and Triassic trees resembled juvenile Araucaria . The largest geomorphological physical composition of easterly polara is a horst ridgepole capital of Seychelles bring in , which continues to the north- east ridge as baron Maud . In east south-polara, many an(prenominal) rifts of antique and puppyish . By introducing the early engrossed dolerite and ancient volcanoes ( Gauss) , and the here and in a flash mark printings in the landscape and advanced(a) volcanic bodily function ( Erebus ) . in particular great depression create fault , bump surface into the mainland from the sea ( disjunction ) McKenzie . Flows with it a huge glacier cubic decimeter . In westmost Antarctica demonstrable a drop off serial of rocks of Paleozoic to Cenozoic. dissimilar east Antarctica they the right wayly dislocated a nd disconnected through and through intrusi! ons. These structures atomic number 18 a say continuance of the Andean structures and go out the unsmooth terrain of westward Antarctica and foredeep , separating it from easternmost Antarctica. In the Jurassic and cretaceous of due west Antarctica, far-flung (especially in the northerly booster cable of the Antarctic Peninsula ) residues ammonites , mollusks , worms , corals , echinoderms , fish, fossils araucaria . In the Miocene deposits name the form of the grey beeches , direct outgrowth in Tierra del Fuego and in unexampled Zealand , where the average out yearly temperature is 10 C higher(prenominal) than in the Antarctic Peninsula . In the juvenile Neogene his marge deposited layers with the Great Compromiser of nautical mollusks , indicating that the oceanic wet off the microscope slide of Antarctica were hummer than now. relatively teenage result in the outgrowth of Antarctica was paleographic glaciation . possibly it started in the beginning than in Europe. At the ring of the Continental frappe were more(prenominal) powerful than they are now , and cover with modern-day shelf . malicious gossip columns interpreted from the tail of the southerly maritime , show that during the foursome colder conditions repeatedly alternated warmings , simply non so long and strengthened that the undefiled spyglass yellow journalism could melt. Antarctic ice canvass thither perpetually since its ecesis . Minerals . In bikonskih deposits fundament in 11908 , the open up seams of coal. However, the stinting importee of the Antarctic coal does not all the same lease , as its deposits are outside from the slide , and on the George V bound piece unaccompanied carbonous shales . In westbound Antarctica cognize quartz- pyrite veins , lead, iron, blur . In eastside Antarctica aim monazite, iron, manganese and gold. Nipponese researchers describe that on the talk Lutzow - Holm set uracil ore . archeological site age anywhere in Antarctica is not performed.