Abstract:87-585This report is preliminary and has not been edited or reviewed for conformity with U.S. Geological Survey publication standards and stratigraphic nomenclature. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the United States Government. Any use of trade names and trademarks in this publication is for descriptive purposes only and does not constitute endorsement b… Show more
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