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The Antarctic plate is a tectonic plate containing the continent of Antarctica, the Kerguelen Plateau, and some remote islands in the Southern Ocean and other surrounding oceans. After breakup from Gondwana (the southern part of the supercontinent Pangea ), the Antarctic plate began moving the continent of Antarctica south to its present ...
Background map: GSHHG v.2.3.7 (public domain); Plates: Prof. Peter Bird; Southwest Pacific Plates’ site; College of Earth and Mineral Sciences, Penn State; Kenneth W. Hudnut from USGS, in Earthquake Spectra, June 2006; USGS: This Dynamic Planet; The Antarctic Tectonic Region’s site; Hotspots: Earth Magazine; Written In Stone blogspot, by Dr ...
The Louisville Ridge stretches diagonally across this bathymetric map of the southwest Pacific Ocean towards the Pacific-Antarctic Ridge at right bottom The Pacific-Antarctic Ridge (PAR, Antarctic Pacific Ridge, South Pacific Rise, South Pacific Ridge) [ 4 ] is a divergent tectonic plate boundary located on the seafloor of the South Pacific ...
<p>Chances are you make it through most days without sparing a thought for Antarctica. At just over 5.4 million square miles, it's a massive chunk of land that is nearly twice the size of ...
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 ...
Retroarc thrusting also occurred at this time. Both events were most likely caused by the incipient subduction of the south-east Pacific Plate under the Gondwana supercontinent. As a result, marginal basin clastics from the Pacific plate's oceanic basement were obducted onto the continental margin of Gondwana, composed of older crystalline ...
Mount Kirkpatrick holds one of the most important fossil sites in Antarctica, the Hanson Formation. Because Antarctica used to be warmer and supported dense conifer and cycad forest, and because all the continents were fused into a giant supercontinent called Pangaea , many ancient Antarctic wildlife share relatives elsewhere in the world.
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