Geologic map of the Redwood Creek drainage basin, Humboldt County, California
Open-File Report
81-496
By: Deborah Reid Harden, H.M. Kelsey, S.D. Morrison, and T.A. Stephens
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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)
Suggested Citation
Harden, D.R., Kelsey, H., Morrison, S., Stephens, T., 1982, Geologic map of the Redwood Creek drainage basin, Humboldt County, California: U.S. Geological Survey Open-File Report 81-496, 1 Plate: 32.46 x 56.62 inches, https://doi.org/10.3133/ofr81496.
ISSN: 2331-1258 (online)
Study Area
| 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 |
| DOI | 10.3133/ofr81496 |
| Year Published | 1982 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | 1 Plate: 32.46 x 56.62 inches |
| Country | United States |
| State | California |
| County | Humboldt County |
| Other Geospatial | Redwood Creek drainage basin |
| Scale | 62500 |