Reston, VA – The U.S. Geological Survey (USGS) and the Association of American State Geologists (AASG) announced that they have developed an updated geologic time scale and color scheme for use in ...
Introduction. The study of the earth / J.F. White -- The law of uniformity and geologic time. James Hutton / Karl von Zittel -- The uniformity of nature / Charles Coulston Gillispie -- Measuring ...
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