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Geologic map of the Redwood Creek drainage basin, Humboldt County, California

Open-File Report 81-496

By:
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Abstract

A 1:62,500-scale geologic map with 14 rock stratigraphic units and an accompanying explanatory text are used to describe the geology of the Redwood Creek drainage basin of northwestern California. A large part of Redwood National Park is located in the downstream part of this actively eroding drainage basin. The bedrock consists primarily of Mesozoic sedimentary and metamorphic rocks. The structurally complex Franciscan assemblage of rocks underlies most of the basin, but rocks of the Klammath Mountain tectonic province occurs in a small eastern part of the basin. Most major boundaries between Mesozoic rock units are north-northwest trending faults parallel to the regional structural trend. Extensive areas of surficial coastal plain sediments, landslide deposits, stream terrace deposits and modern alluvium are also present; these areas help identify loci of vigorous recent erosion. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Geologic map of the Redwood Creek drainage basin, Humboldt County, California
Series title:
Open-File Report
Series number:
81-496
Edition:
-
Year Published:
1982
Language:
ENGLISH
Description:
1 map :col. ;45 x 130 cm. on sheet 83 x 143 cm., folded in envelope 30 x 24 cm.