Revision History for USGS Scientific Investigations Map 2899 Michael A. Clynne and L.J. Patrick Muffler Geologic Map of Lassen Volcanic National Park and Vicinity, California ----------------------------------------------------- Released in paper form with CD-ROM ISBN: 978-1-4113-3024-5 February 2011 Posted online at http://pubs.usgs.gov/sim/2899/ December 30, 2010 -----------------------------------------------------