GIS Data
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Map showing inventory and regional susceptibility for Holocene debris flows, and related fast-moving landslides in the conterminous United States Map showing inventory and regional susceptibility for Holocene debris flows, and related fast-moving landslides in the conterminous United States
Introduction Debris flows, debris avalanches, mud flows and lahars are fast-moving landslides that occur in a wide variety of environments throughout the world. They are particularly dangerous to life and property because they move quickly, destroy objects in their paths, and often strike without warning. This map represents a significant effort to compile the locations of known debris...
Pu‘u ‘Ō‘ō cone and surroundings as of March 2000 Pu‘u ‘Ō‘ō cone and surroundings as of March 2000
Pu‘u ‘Ō‘ō cone and surroundings as of March 2000 showing the area covered (dark gray) by lava since February 1997 during episode 55. Inside the crater of Pu‘u ‘Ō‘ō, the "trough" is the drained lava pond of September–October 1999.
Geologic map and map database of parts of Marin, San Francisco, Alameda, Contra Costa, and Sonoma counties, California Geologic map and map database of parts of Marin, San Francisco, Alameda, Contra Costa, and Sonoma counties, California
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area. Together with the accompanying text file (mageo.txt, mageo.pdf, or mageo.ps), it provides current information on the geologic structure and stratigraphy of the area covered. The...
Distribution of a suite of elements including arsenic and mercury in Alabama coal Distribution of a suite of elements including arsenic and mercury in Alabama coal
Arsenic and other elements are unusually abundant in Alabama coal. This conclusion is based on chemical analyses of coal in the U.S. Geological Survey's National Coal Resources Data System (NCRDS; Bragg and others, 1994). According to NCRDS data, the average concentration of arsenic in Alabama coal (72 ppm) is three times higher than is the average for all U.S. coal (24 ppm). Of the U.S...