Founded April 6, 1951
The Shoshone Rock Club meets monthly at the Powell Library meeting room at 7:30 pm. Members are provided with the use of a Rock Work Shop to cut and polish rocks, etc.
Address: Shoshone Rock Club, P.O. Box 256, Powell, WY 82435
Email address: mailto:[email protected]
|GEOLOGIC TIME PERIODS
How they got their names . . .
The three geologic eras are the PALEOZOIC, MESOZOIC and CENOZOIC - from the Greek for ancient, middle and recent life. They are divided into 11 periods most of them named for the places where rocks from the period were first discovered.
The Cambrian Period (570-500 million years ago) is named for Cambria, or Wales. The next two periods also received Welsh names: Ordovician and Silurian for two Welsh tribes, the Ordovicies and the Siluries.
The Devonian is named for Devonshire, England, and the Cretaceous comes from "creta", Latin for chalk, referring to the White Cliffs of Dover, England.
The Jurassic is named for the Jura Mountains in Germany, and the Permian for Perm is Russia's Ural Mountains.
The Triassic got its name because it was easily divided into three parts. In North America the Carboniferous (carbon = coal) is subdivided into the Mississipian, named for the Mississippi River and the Pennsylvanian, named for the coal deposits first discovered in the state of Pennsylvania.
Reference: The Pterodactyl, The Roamin R&M Club, 04/03, via Quarry Guips, 11/03, and printed in the Rocky Mountain Federation News, 01/04. (modified).
A NEW ERA - 2006
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Page updated May 03, 2009 by Linda MacDonald