Denver, Colorado : Open-File Services Section, Western Distribution Branch, U.S. Geological Survey
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Map
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Map showing outcrops of pre-quaternary ash-flow tuffs and volcaniclastic rocks, basin and range province, Northern California / compiled by Jane E. Jenness, T.L.T. Grose, and David A. Lopez
Relief shown by contours and spot heights. Title from title screen (viewed Feb. 29, 2016). "Prepared in cooperation with the California Division of Mines and Geology." Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/). Includes location map.