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Lecture 23-new - Lecture 23 Cenozoic Environments and...

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Lecture 23: Cenozoic Environments and Climate Change The world of mammals has changed dramatically since its beginning, just after the dinosaur extinction. Except for one notable ‘hot period’ in the early Cenozoic, climate has been getting colder and colder for 10s of millions of years.
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Cenozoic Climate and Environmental Changes Our understanding of climate and environmental changes in the Cenozoic is significantly better than for previous times. This is because the geological record of our most recent geological Era is more complete - especially the terrestrial part of it. Also, we have a better ability to date geological events precisely and in good detail (events that might last thousands of years or less).
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Return of large animals to the sea - but mammals, not reptiles Beginning of glaciation that leads to present day.
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Cenozoic has the best record of terrestrial environmental changes. Terrestrial records are critical for assessing environmental changes that could affect humans.
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