Lecture 22-new

Lecture 22-new - Lecture22:TheMesozoicEra AOnceandFuture...

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Lecture 22: The Mesozoic Era - A Once and Future ‘Greenhouse World’ The world of the Dinosaurs about 65-240 million years ago
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The Stage of Earth History
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The Mesozoic Terrestrial World - Dinosaurs!
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The Mesozoic Marine World - Mososaurs!
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The Mesozoic Marine World - Ichthyosaurs!
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The Mesozoic Marine World - Plesiosaurs!
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Major Events of Early Mesozoic Time
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Major Events of Late Mesozoic Time (Cretaceous Period)
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Plate Tectonic Configuration Pangaea had broken up. Laurasia was located in the Northern Hemisphere Gondwana was located in the Southern Hemisphere. The two super continents were separated by the Tethys Sea. A huge ‘Pacific Ocean’ ran from the North Pole to almost the South Pole.
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Mesozoic Climate The Mesozoic (especially the Cretaceous) Period) was perhaps the warmest time for the planet as a whole in the last 300 million years. Proxy evidence for warm conditions: Coal deposits at high latitude Pollen evidence for trees far above the Arctic Circle
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Lecture 22-new - Lecture22:TheMesozoicEra AOnceandFuture...

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