Rocky Mountain Geology Teacher Guide National Park Service

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Date: 2014-07-16 16:51:29 Mountain ranges of Colorado Geology of the Rocky Mountains Rocky Mountain National Park Front Range Geology Lewis Overthrust Geology of the Grand Teton area Physical geography Rocky Mountains Colorado		Rocky Mountain Geology Teacher Guide National Park Service Add to Reading List Source URL: www.nps.gov Download Document from Source Website File Size: 2,06 MB Share Document on Facebook

	1 Basement Rocks The metamorphic basement rocks that were formed about 2.5 billion years ago in the Archean Eon. These igneous rocks are radioactive age measurements that indicate the ages of 1,690 million and 2,540 mil DocID: RaJk - View Document
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	Rocky Mountain Geology Teacher Guide National Park Service DocID: Czl2 - View Document
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	Prepared in cooperation with Washington State Division of Geology and Earth Resources, U.S. National Park Service, and U.S. Forest Service Geologic Map of the North Cascade Range, Washington By Ralph A. Haugerud and Rowl DocID: l9uM - View Document