Topic%2006_Ordovician

Topic%2006_Ordovician - Ordovician Note where the South...

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Ordovician Note where the South Pole is in late Proterozoic. What does this suggest about glaciation? Sea levels? How did the global climate change? How about sea level?
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Ordovician climate ? Ordovician sea level? What area of Laurentia broke off during the Ordovician? What orogeny resulted from the closure of the Ordovician Iapetus Sea ? What Ordovician orogeny is pictured here? What have the Ordovician pyroclastics weathered to today? Explain the origin of the Ordovician rocks shown here.
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Pole at the end of Ordovician time? What happened to life at this time? The Ordovician occurred between about 450 and (400, 500 ) million years ago. A defining characteristic of the Ordovician was the (extinction, diversification )of marine invertebrate Paleozoic Fauna . Like many geologic periods, the Ordovician started and ended with an (diversification, extinction ). The first major Paleozoic ice age occurred at (End Cambrian, End Ordovician, End Devonian ). What are these fossils?
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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%2006_Ordovician - Ordovician Note where the South...

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