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Geologic map of northwestern Seattle (part of the Seattle North 7.5 deg. X 15 deg. quadrangle), King County, Washington

Scientific Investigations Map 2903

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Abstract

This map is the first of four new geologic maps covering the city of Seattle that are based on field exposures and an extensive database of subsurface geologic explorations. The landforms and near-surface deposits here record a relatively brief, recent period in the geologic history of the region that was dominated by the last advance of the continental ice sheet that covered the region about 17,000 years ago. Beneath the deposits of this ice sheet is a complex succession of older sediments that extends far below sea level across most of the map area. These older sediments are now exposed where modern erosion and landslides have sliced through the edge of the upland, most notably in coastal bluffs along Puget Sound.

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Geologic map of northwestern Seattle (part of the Seattle North 7.5 deg. X 15 deg. quadrangle), King County, Washington
Series title:
Scientific Investigations Map
Series number:
2903
Edition:
Use with OFR 2005-1252
Year Published:
2005
Language:
ENGLISH
Description:
1 sheet, 36 in. x 50 in.; geodatabase
Additional Online Files (Y/N):
Y