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Map showing depth to bedrock of the Tacoma and part of the Centralia 30' x 60' quadrangles, Washington

Miscellaneous Field Studies Map 2265

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Abstract

The heavily populated Puget Sound region in the State of Washington has experienced moderate to large earthquakes in the recent past (Nuttli, 1952; Mullineaux and others, 1967). Maps showing thickness of unconsolidated sedimentary deposits are useful aids in delineating areas where damage to engineered structures can result from increased shaking resulting from these earthquakes. Basins containing thick deposits of unconsolidated materials can amplify earthquakes waves and cause far more damage to structures than the same waves passing through bedrock (Singh and others, 1988; Algermissen and others, 1985). Configurations of deep sedimentary basins can also cause reflection and magnification of earthquake waves in ways still not fully understood and presently under investigation (Frankel and Vidale, 1992).

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Map showing depth to bedrock of the Tacoma and part of the Centralia 30' x 60' quadrangles, Washington
Series title:
Miscellaneous Field Studies Map
Series number:
2265
Edition:
-
Year Published:
1994
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Description:
Plate 1: 37.20 x 52.65 inches; Plate 2: 40.98 x 25.40 inches
Country:
United States
State:
Washington
City:
Centralia;Tacoma
Scale:
100000