Wednesday, September 30, 2009

Geologic Periods

The geologic periods are: Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, Permian, Triassic, Jurassic, Cretaceous, Tertiary, and Quaternary.

A mnemonic for this is Cheddar Or Swiss Don't Matter Pennsylvanians Prefer Trout or Just Crackers.

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