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West Antarctica was partially in the northern hemisphere, and during this period large amounts of sandstones, limestones and shales were deposited. East Antarctica was at the equator, where sea-floor invertebrates and trilobites flourished in the tropical seas. By the start of the Devonian period (416 Ma) Gondwana was in more southern latitudes ...
Pages in category "Rock formations of Antarctica" The following 55 pages are in this category, out of 55 total. This list may not reflect recent changes. A.
Shows a sea below both the Atlantic and Pacific oceans at a time when Tierra del Fuego was believed joined to Antarctica. Sea is named Mer Magellanique after Ferdinand Magellan . Samuel Dunn's 1794 General Map of the World or Terraqueous Globe shows a Southern Ocean (but meaning what is today named the South Atlantic) and a Southern Icy Ocean .
The Antarctic Peninsula, roughly 1,000 kilometres (650 mi) south of South America, is the northernmost portion of the continent of Antarctica. Like the associated Andes, the Antarctic Peninsula is an excellent example of ocean-continent collision resulting in subduction. [1]
The East Antarctic Shield or Craton is a cratonic rock body that covers 10.2 million square kilometers or roughly 73% of the continent of Antarctica. [1] The shield is almost entirely buried by the East Antarctic Ice Sheet that has an average thickness of 2200 meters but reaches up to 4700 meters in some locations.
Ross Sea Antarctica sea floor geology showing major basins and drill sites. Seismic studies in the latter half of the twentieth century defined the major features of the geology of the Ross Sea. [12] The deepest or basement rocks, are faulted into four major north trending graben systems, which are basins for sedimentary fill. These basins ...
R. Vodrazka and L. A. Crame. 2011. First fossil sponge from Antarctica and its paleobiogeographical significance. Journal of Paleontology 85(1):48-57; G. F. Webers, J. Pojeta, and E.L. Yochelson. 1992. Cambrian Mollusca from the Minaret Formation, Ellsworth Mountains, West Antarctica. Geological Society of America Memoir 170:181-248
Antarctica The McMurdo Volcanic Group is a large group of Cenozoic volcanic rocks in the western Ross Sea and central Transantarctic Mountains areas of Antarctica . [ 1 ] It is one of the largest provinces of alkaline volcanism in the world, having formed as a result of continental rifting along the West Antarctic Rift System .