Fact Sheets

From time to time, the Association of American State Geologists (AASG) will issue a fact sheet on a topic of interest. The AASG represents the State Geologists of the 50 United States and Puerto Rico. Founded in 1908, the AASG seeks to advance the science and practical application of geology and related earth sciences in the United States and its territories, commonwealths, and possessions.