“A report published by the U.S. Geological Survey (USGS) contains a regional map and associated database that inventory 61 locations of reported natural asbestos and fibrous amphibole occurrences in the Rocky Mountain area of the United States, including the states of Colorado, Idaho, Montana, New Mexico, and Wyoming. The map is based on a search of scientific literature and does not identify any new occurrences of asbestos. It is the third in a series which originated in 2005 with a similar report for the Eastern United States and was followed in 2006 by a product that encompasses the Central United States. USGS Open File Report 2007-1182, “Reported Historic Asbestos Mines, Historic Asbestos Prospects, and Natural Asbestos Occurrences in the Rocky Mountain States of the United States (Colorado, Idaho, Montana, New Mexico, and Wyoming),” corrects inaccurate locality information in previously published maps and data compilations at regional and national scales and includes additional published natural asbestos occurrences that appear in historic literature. This report is part of an ongoing effort to update existing national-scale databases on asbestos occurrences.”