GIS Data
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Gravity anomaly and interpretation map of the Chignik and Sutwik Island quadrangles, Alaska
The gravity field of the Chignik and Sutwik Island
quadrangles near the center of the Alaska Peninsula represents
a complex series of transitions between probable
continental crust on the north, probable oceanic crust on the
south, sedimentary basins on each side of the peninsula, and a
central structural high and volcanic arc. The resulting
gravity field may be generalized as a central southwest-
Increasing the availability of national mapping products.
A discussion of the means employed by the US Geological Survey to facilitate map usage, covering aspects of project Map Accessibility Program including special rolled and folded map packaging, new market testing, parks and campgrounds program, expanded map dealer program, new booklet-type State sales index and catalog and new USGS map reference code. The USGS is seen as the producer of a tremendou
Index map of flood studies, Culpeper Basin, Virginia and Maryland
No abstract available.
Interpretation of an aerial radiometric survey of the San Gorgonio Wilderness Area and vicinity, San Bernardino County, California
The aerial radiometric data for the San Gorgonio Wilderness Area show slight correlation with mapped geology and contain no information of economic significance. Precambrian and modified Precambrian crystalline rocks have more eTh compared to Mesozoic plutonic rocks and one rock unit mapped as a pluton has slightly more K. These rocks have essentially uniform ratios of eU/eTh and eU/K despite thei
Interpretation of graphic data on potential geologic hazards on the southeastern United States Atlantic continental shelf
This report presents and analyzes seismic-survey data and bottom-instrument data as they pertain to a regional assessment of potential geologic hazards and other constraints to petroleum exploration and development on the southeastern United States Continental Shelf (see fig. 1).
Magnetic declination in the United States; epoch 1980
No abstract available.
Magnetic total intensity in the United States; epoch 1980
No abstract available.
Map of marine magnetic data from Shelikof Strait to Sutwik Island, Alaska
No abstract available.