BATHYMETRY AND GEOLOGY OF THE FLOOR OF YELLOWSTONE LAKE, YELLOWSTONE NATIONAL PARK, wYOMING, IDAHO, AND MONTANA By LISA A. MORGAN, W.C. PAT SHANKS, GREGORY K. LEE, AND MICHAEL W. WEBRING 2007 Scientific Investigations Map 2973 NOTE: The GIS database for this map has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. The database can be downloaded from the USGS server on URL http://pubs.usgs.gov/sim/2007/2973/. In addition, a PDF file of the map may be downloaded, from which paper copies may be printed. The database and other files are as follows: Readme file-- 00readme.txt Metadata file-- 2973_meta.txt Export file-- ysflt2.e00--Faults ysdeco.e00--Direction of ice flow arrows ysgeo2.e00--Geology polygons and arcs ysvent.e00--Hydrothermal vents Shaded_Relief_Map.pdf