Development_of_Life_2

Development_of_Life_2 - Development of Life Development of...

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evelopment of Life Development of Life (continued) Stephen Eikenberry 07 September 2010 AST 2037 2
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Evolutionary Timeline 530 MYa – first footprint fossil found on land 505 Mya – first true fish in the sea 75 MYa rst land 475 MYa – first land plant fossils 360 MYa -- Beginning fth C b if of the Carboniferous Age (lots of land plants and trees!) 360 MYa – First amphibians, followed quickly by first reptiles; insects on land/air; sharks in the ocean 3
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Permian Era 285 MYa to about 250 MYa Earth would now have been “recognizable” (if somewhat weird!) Land has immense forests of trees and other plants (but no owers!) flowers!) Ocean has lots of fish (including sharks), marine mammals, still trilobites too 4
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Permian Era Land has insects, amphibians, reptiles Reptiles could reach sizes of 10-20 feet (!) 5
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Permian Era: Pangaea One of several supercontinents formed over the history of Earth 6
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End-Permian By the late Permian, things seem to be going very well! Tremendous diversity of life: lants and animals Plants and animals Sea and Land Then … it all stopped (!) e … t a stopped (!) 7
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Permian Extinction AKA “The Great Dying” 96% of all marine species extinct 70% of land vertebrates extinct Note – not individual critters, but entire species !
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This note was uploaded on 07/26/2011 for the course AST 2037 taught by Professor Eikenberry during the Fall '08 term at University of Florida.

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Development_of_Life_2 - Development of Life Development of...

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