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Gravity anomaly and interpretation map of the Chignik and Sutwik Island quadrangles, Alaska 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...
Increasing the availability of national mapping products. 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