Paleozoic climate

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{{Paleozoic}}
{{Paleozoic}}
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[[Image:DevonianSea.jpg|thumb|Devonian sea floor scene from the OTS Heavy Oil Science Center.]]
The [[Early Cambrian]] climate was probably moderate at first, becoming warmer over the course of the [[Cambrian]], as the second-greatest sustained sea level rise in the [[Phanerozoic]] got under way.  However, as if to offset this trend, [[Gondwana]] moved south with considerable speed, so that by the [[Ordovician]] west Gondwana ([[Africa]] and [[South America]]) was centered near  the South Pole.  The Early Paleozoic climate was also strongly zonal, with the result that the "climate", in an abstract sense became warmer, but the living space of most organisms of the time - the continental shelf marine environment - became steadily colder.  However, [[Baltica]] (Northern Europe and Russia) and [[Laurentia]] (eastern North America and Greenland) remained in the tropical zone, while [[China]] and [[Australia]] lay in waters which were at least temperate.  The Early Paleozoic ended, rather abruptly, with the short, but apparently severe, [[Late Ordovician]] Ice Age.  This cold spell caused the second-greatest mass extinction of Phanerozoic time.   
The [[Early Cambrian]] climate was probably moderate at first, becoming warmer over the course of the [[Cambrian]], as the second-greatest sustained sea level rise in the [[Phanerozoic]] got under way.  However, as if to offset this trend, [[Gondwana]] moved south with considerable speed, so that by the [[Ordovician]] west Gondwana ([[Africa]] and [[South America]]) was centered near  the South Pole.  The Early Paleozoic climate was also strongly zonal, with the result that the "climate", in an abstract sense became warmer, but the living space of most organisms of the time - the continental shelf marine environment - became steadily colder.  However, [[Baltica]] (Northern Europe and Russia) and [[Laurentia]] (eastern North America and Greenland) remained in the tropical zone, while [[China]] and [[Australia]] lay in waters which were at least temperate.  The Early Paleozoic ended, rather abruptly, with the short, but apparently severe, [[Late Ordovician]] Ice Age.  This cold spell caused the second-greatest mass extinction of Phanerozoic time.   

Revision as of 18:48, 17 February 2009

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