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Thickness of unconsolidated deposits of the Puget Sound aquifer system, Washington and British Columbia

Water-Resources Investigations Report 94-4133

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Abstract

The Puget-Willamette Lowland is located in western Washington, western Oregon, and a small part of southwestern British Columbia, Canada. The Puget-Willamette Lowland study area is composed of two distinct subareas, the Puget Sound Lowland and the Willamette Lowland. This report presents the results of mapping the thickness of the unconsolidated deposits in the Puget Sound Lowland. The thickness of the unconsolidated deposits ranges from a discontinuous veneer in areas of bedrock outcrop to more than 3,600 feet. Available information shows that the unconsolidated deposits are thickest in the Fraser-Whatcom, Everett, Seattle, and Tacoma Basins. The mapped thickness of the unconsolidated deposits in the Tacoma Basin is probably underestimated because of the scarcity of wells penetrating the full thickness of the unconsolidated deposits and the lack of sufficient marine-seismic data.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Thickness of unconsolidated deposits of the Puget Sound aquifer system, Washington and British Columbia
Series title:
Water-Resources Investigations Report
Series number:
94-4133
Edition:
-
Year Published:
1996
Language:
ENGLISH
Description:
map, scale 1:450,000
Scale:
450000