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Preliminary geologic map of the eastern Willapa Hills, Cowlitz, Lewis, and Wahkiakum Counties, Washington

Open-File Report 2014-1063
Prepared in cooperation with the State of Washington Department of Natural Resources, Division of Geology and Earth Resources
By:  and 
https://doi.org/10.3133/ofr20141063

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Abstract

This digital map database and the PDF derived from the database were created from the analog geologic map: Wells, R.E. (1981), “Geologic map of the eastern Willapa Hills, Cowlitz, Lewis, and Wahkiakum Counties, Washington.” The geodatabase replicates the geologic mapping of the 1981 report with minor exceptions along water boundaries and also along the north and south map boundaries. Slight adjustments to contacts along water boundaries were made to correct differences between the topographic base map used in the 1981 compilation (analog USGS 15-minute series quadrangle maps at 1:62,500 scale) and the base map used for this digital compilation (scanned USGS 7.5-minute series quadrangle maps at 1:24,000 scale). These minor adjustments, however, did not materially alter the geologic map. No new field mapping was performed to create this digital map database, and no attempt was made to fit geologic contacts to the new 1:24,000 topographic base, except as noted above. We corrected typographical errors, formatting errors, and attribution errors (for example, the name change of Goble Volcanics to Grays River Volcanics following current State of Washington usage; Walsh and others, 1987). We also updated selected references, substituted published papers for abstracts, and cited published radiometric ages for the volcanic and plutonic rocks. The reader is referred to Magill and others (1982), Wells and Coe (1985), Walsh and others (1987), Moothart (1993), Payne (1998), Kleibacker (2001), McCutcheon (2003), Wells and others (2009), Chan and others (2012), and Wells and others (in press) for subsequent interpretations of the Willapa Hills geology.

Suggested Citation

Wells, R., Sawlan, M.G., 2014, Preliminary geologic map of the eastern Willapa Hills, Cowlitz, Lewis, and Wahkiakum Counties, Washington: U.S. Geological Survey Open-File Report 2014-1063, 2 Sheets: 33.36 x 51.01 inches and 31.54 and 33.49 inches; Database; Shape Files; Metadata, https://doi.org/10.3133/ofr20141063.

ISSN: 2331-1258 (online)

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Preliminary geologic map of the eastern Willapa Hills, Cowlitz, Lewis, and Wahkiakum Counties, Washington
Series title Open-File Report
Series number 2014-1063
DOI 10.3133/ofr20141063
Year Published 2014
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Geology, Minerals, Energy, and Geophysics Science Center
Description 2 Sheets: 33.36 x 51.01 inches and 31.54 and 33.49 inches; Database; Shape Files; Metadata
Country United States
State Washington
County Cowlitz County, Lewis County, Wahkiakum County
Other Geospatial Willapa Hills
Projection Universal Transverse Mercator projection
Scale 50000
Online Only (Y/N) Y
Additional Online Files (Y/N) Y
Additional publication details