Topic%209_Devonian

Topic%209_Devonian - Devonian About how long ago ? What is...

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Devonian About how long ago ? What is this ? What is this large fossil?
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The Devonian occurred some (300-350 350-400 400-450 ) million years ago. The Devonian was the age of ( apes dinosaurs fishes ). The Devonian saw the first land ( vertebrates invertebrates ) The Devonian saw a great diversification of (vascular conifer flowering ) plants This occurred in late Devonian (extinction desertification ) The first true trees appeared in the ( Cambrian Silurian Devonian ) Invertebrate and plant life teemed in the vast ( ocean desert )that covered much of the Devonian globe. Ammonoid ( cephalopods corals plankton )first appeared in the Early Devonian, along with siliceous sponges. Brachiopods reached their maximum diversity as did hundreds of rugose ( coral sponge worm ) species. Tabulate, rugose, and stromatoporoid corals produced some of the largest ( island swamp reef )complexes in Earth’s history. Most groups of ( arthropods geese trilobites ) had disappeared by the end of the Devonian, leaving only a select few genera to continue on through the Carboniferous and Permian.
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How big ? What are these ?
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This note was uploaded on 08/23/2009 for the course GEOL 102 taught by Professor Kennethsprenke during the Fall '09 term at Idaho.

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Topic%209_Devonian - Devonian About how long ago ? What is...

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