File:USGS-PP1661d-fig22.png

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Description

English: Geophysical anomalies and crustal faulting in the Puget Lowland, showing Everett, Tacoma, and Seattle Basins. Bouger gravity anomaly data combined with seismic reflection traveltime data to model rock density at 5 km depth. Blue is the softer, less dense sedimentary deposits, red is the harder, more dense mafic basalt of the Crescent Formation, other colors are intermediate. Black lines are shoreline of Puget Sound, Hood Canal, and the Strait of Juan de Fuca. White dashed lines are crustal faults; faults east of Tacoma Basin are conjectural.

Date

Unknown date; approx. 2005.

Source

http://pubs.usgs.gov/pp/pp1661d/pp1661d.pdf

Author

U,S. Geological Survey staff

Permission
(Reusing this file)

This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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From USGS Professional Paper 1661-D (2005), "Crustal Structure of the Cascadia Fore Arc of Washington", fig. 22, p. 34.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	23:13, 24 April 2010		340 × 411 (500 KB)	J. Johnson	{{Information \|Description={{en\|1=Geophysical anomalies and crustal faulting in the Puget Lowland, showing Everett, Tacoma, and Seattle Basins. Bouger gravity anomaly data combined with seismic reflection traveltime data to model rock density at 5 km de