Free Gondwana Essays and Papers

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Free Gondwana Essays and Papers

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    Antarctic Midges

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    african organisms are already well established, the limited terrestrial animals of antarctica meant that studies of extant species with gondwanan distribution rarely included Antarctica. Antarctic midges may be the missing link to tie antarctica into Gondwana.

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    Construction of Gondwana

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    Gondwana was the biggest continental crust unit on earth for more than two hundred million years. It took its shape at approximately 600 Ma during the Early Paleozoic, end of the Pan-African- Brasiliano orogeny and found to be in the southern hemisphere between at about the same time of formation (Trompette, 2000). Gondwana was built of almost all of the landmass, nowadays found in southern hemisphere containing Africa, Australia, Antarctica, South America, Madagascar, Arabian Peninsula and India

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    Precambrian Era The Precambrian era laster 4600-541 million years ago. During this time, there were no plant life on the planet. Most of the things that were on the planet were rocks. The most common type of rock was Isua greenstone. Most rocks have been eroded away, subducted, or metamorphosed. During this time, the atmospheres and oceans were formed, plate tectonics began to build up continental masses. The air during this time was mostly made up of water vapor, carbon dioxide, and nitrogen. Later

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    the man who wasnt

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    The base of the Cretaceous is easily distinguished in our dataset as the horizon separating the synrift Jurassic deposits from the post-rift Cretaceous. There are four main tectonic evolution phases seen in the area: 1) during the break up of Gondwana a series of intracratonic basins formed, 2) Early Jurassic extension which created the four main depocenters including the Barrow sub-basin, 3) during the Middle Jurassic there was another phase of extension which resulted in seafloor spreading,

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    Evolution is the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth (Google). Scientists have many evidences to prove Evolution. One of these evidences is rock layers. Rock layers are beds of sedimentary rock, consisting of one type of matter, and can usually have fossils found in them. Rock layers are an evidence of evolution because they show the development of life through fossils, show how rock

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    Precambrian Era: The Precambrian Era is when the Earth formed. Earth was barley a spec of dust in outer space and as time went by it gathered ice, rock and more dust particles. It eventually formed into a big rock flying around in space. The Earth was extremely hot and so when it rained the rain would evaporate in mid air or immediately after it hit the ground. But even though it evaporated these great rains cooled the Earth eventually building up water in lower areas creating oceans. The Earths

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    1. Introduction Marie Byrd Land (MBL) is a massif within West Antarctica that is of critical importance in understanding the evolution of the West Antarctic Rift System (WARS). Although the WARS is comparable in size other rift systems, it is poorly understood due to extensive ice cover (LeMasurier, 2008). MBL contains exposures which inform on the behavior of the WARS over time (Cande et al., 2000; Steinberger et al., 2004) and the potential for subglacial volcanism associated with the system to

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    landmasses that were once united to form the geological supercontinent, Gondwana. A series of fragmentation periods divided the supercontinent, ultimately lasting 500 million years (citation). The continents that were once unified include landmasses that today form part of the southern hemisphere including Antarctica, South America, Africa, India and Australia (citation). Australia formed the north-eastern part of the coast of Gondwana lying north of Antarctica (figure). Around 250 million years ago, the

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    Firstly, the rainforest’s wildlife demonstrates earth’s 8 evolutionary stages: The “Age of the Pteridophytes”, the “Age of the Conifers and Cycads”, the “Age of the Angiosperms”, along with the seperation of Gondwana, biological evolution and radiation during thirty-five million years of isolation, the beginnings and radiation of songbirds, the integration of Australia and Asia flora and fauna, and finally the tremendous effects of the Pleistocene glacial periods on tropical rainforest vegetation

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    The Ordovician Period

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    slightly north of the equator. The Iapetus Ocean separated these two masses on the south from the continent of Baltica. Avalonia (England, New England, and parts of Canada) was to the west of Baltica. England, Baltica, and Kazakhstan were separated from Gondwana by the Paleotethys Sea. At this time, Africa and South America were rotated almost 180° from their current location. The Panthalassic Ocean covered the Northern Hemisphere almost completely. The rate of seafloor spreading was minimal during

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