oaioai:CiteSeerX.psu:10.1.1.1032.7912

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report is preliminary and has not been edited or reviewed for conformity with the Geological Survey standards and nomenclature. Any use of trade names and trademarks in this publication is fcr descriptive purposes only and does not constitute endoresment by the U. S. Geological Survey

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oaioai:CiteSeerX.psu:10.1.1.1032.7912Last time updated on 4/12/2017

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