GIS Data
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Geologic Map of the North Cascade Range, Washington Geologic Map of the North Cascade Range, Washington
The North Cascade Range, commonly referred to as the North Cascades, is the northern part of the Cascade Range that stretches from northern California into British Columbia, where it merges with the Coast Mountains of British Columbia at the Fraser River. The North Cascades are generally characterized by exposure of plutonic and metamorphic rocks in contrast to the volcanic terrain to...
Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, May 2009 Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, May 2009
The Floridan aquifer system consists of the Upper and Lower Floridan aquifers separated by the middle confining unit. The middle confining unit and the Lower Floridan aquifer in west-central Florida generally contain highly mineralized water. The water-bearing units containing fresh water are herein referred to as the Upper Floridan aquifer. The Upper Floridan aquifer is the principal...
Sidescan Sonar Imagery of the Escanaba Trough, Southern Gorda Ridge, Offshore Northern California Sidescan Sonar Imagery of the Escanaba Trough, Southern Gorda Ridge, Offshore Northern California
This map features sidescan imagery of the northern Escanaba (NESCA) site at the Escanaba Trough, southern Gorda Ridge, offshore northern California. The Escanaba Trough, a largely sediment-covered seafloor spreading center, contains at least six large massive sulfide deposits. It is a slow spreading center (2.5 cm/yr) with axial depths locally exceeding 3,300 m. Discrete igneous centers...
Geologic Setting and Hydrogeologic Units of the Columbia Plateau Regional Aquifer System, Washington, Oregon, and Idaho Geologic Setting and Hydrogeologic Units of the Columbia Plateau Regional Aquifer System, Washington, Oregon, and Idaho
The Columbia Plateau Regional Aquifer System (CPRAS) covers approximately 44,000 square miles of northeastern Oregon, southeastern Washington, and western Idaho. The area supports a $6 billion per year agricultural industry, leading the Nation in production of apples and nine other commodities (State of Washington Office of Financial Management, 2007; U.S. Department of Agriculture, 2007...
Potentiometric surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, May 2009 Potentiometric surface of the Upper Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, May 2009
This map depicts the potentiometric surface of the Upper Floridan aquifer in the St. Johns River Water Management District and vicinity for May 2009. Potentiometric contours are based on water-level measurements collected at 625 wells during the period May 14 - May 29, near the end of the dry season. Some contours are inferred from previous potentiometric-surface maps with larger well...
Geologic Map of the Santa Barbara Coastal Plain Area, Santa Barbara County, California Geologic Map of the Santa Barbara Coastal Plain Area, Santa Barbara County, California
This report presents a newly revised and expanded digital geologic map of the Santa Barbara coastal plain area at a compilation scale of 1:24,000 (one inch on the map to 2,000 feet on the ground)1 and with a horizontal positional accuracy of at least 20 m. The map depicts the distribution of bedrock units and surficial deposits and associated deformation underlying and adjacent to the...