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GIS Data

USGS is a primary source of geographic information system (GIS) data. Our data and information is presented in spatial and geographic formats, including The National Map, Earth Explorer, GloVIS, LandsatLook, and much more. Explore GIS Data Maps. 

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Photographs of the Upper Pleistocene section at Sankaty Head cliff, Nantucket Island, Massachusetts Photographs of the Upper Pleistocene section at Sankaty Head cliff, Nantucket Island, Massachusetts

The pre-Sangamonian and Wisconsinan glacial drift units and Sangamonian marine beds exposed tin the Sankaty Head cliff (fig. 1) constitute a unique and important upper Pleistocene stratigraphic section in southern New England. Many workers have studied the section over the past 130 years, paying most attention to the fossiliferous Sankaty Sand. The earliest study was by Desor and Cabot...

Pre-Monterey subcrop and structure contour maps, western San Luis Obispo and Santa Barbara Counties, south-central California Pre-Monterey subcrop and structure contour maps, western San Luis Obispo and Santa Barbara Counties, south-central California

Pre-Monterey (Miocene) subcrop and structure contour maps have been compiled from existing maps and well-hole data to depict the distribution of rocks that lie beneath the Monterey Formation and on which Tertiary rocks were deposited. These maps indicate the general topography of the sea floor when the Monterey Formation was deposited.
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