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Open-File Report O-15-04, Geologic map of the southern Oregon coast between Bandon, Coquille, and Sunset Bay, Coos County, Oregon, by Thomas J. Wiley, Jason D. McClaughry, Clark A. Niewendorp, Lina Ma, Heather H. Herinckx, and Katherine A. Mickelson

Download .zip file (57 MB)


thumbnail image of OFR O-14-01 Publication contains a 57-page pamphlet PDF, four 1:24,000-scale map plate PDFs, Esri ArcGIS® 10.1 geodatabase, GIS files, and Microsoft Excel® spreadsheets. Note: This publication continues geologic mapping along the southern Oregon Coast; see Open-File Report O-13-21, Geologic map of the southwestern Oregon coast between Crook Point and Port Orford, Curry County, Oregon and Open-File Report O-14-01, Geologic map of the southern Oregon coast between Port Orford and Bandon, Curry and Coos Counties, Oregon for previous mapping.

Publication contents are listed below.

From the introduction to the report:

This report, digital geodatabase, and the accompanying set of plottable geologic maps were prepared to provide an updated and spatially accurate geologic framework for the southern Oregon coast between Bandon, Coquille, and Sunset Bay in western Coos County (Figure 1). Geologic mapping summarized here represents one part of a multi-year project to map the Oregon coast from the California border north to Coos Bay (Figure 2). The project is a high priority of the Oregon Geologic Map Advisory Committee (OGMAC) and was supported in part during 2014 and 2015 by the U.S. Geological Survey (USGS) STATEMAP component of the National Cooperative Geologic Mapping Program under assistance award G14AC00165. Matching funds were provided by the Oregon Department of Geology and Mineral Industries (DOGAMI). The core product of this study is an Esri ArcGIS™ ArcMap™ 10.1 format geodatabase that combines new and existing mapping in a digital format consistent with the digital statewide Oregon Geologic Data Compilation database (OGDC-5, Ma and others, 2009). Both bedrock and surficial geologic interpretations can be recovered from the geodatabase. It contains spatial information about geologic units and structures, and basic data about each geologic unit such as age, lithology, mineralogy, and structure. Digitization at scales of 1:8,000 or better was accomplished using georeferenced lidar base layers. The geodatabase is supported by this report describing the geology in detail, and digital appendices with geochemical, geochronological, structural, and water well data. Four plottable geologic maps, showing the distribution of contrasting bedrock lithologies, critical structural relationships, and surficial geology, cover the Bill Peak 7.5′ quadrangle (Plate 1), the Coquille 7.5′ quadrangle (Plate 2), the Bullards and Riverton 7.5′ quadrangles (Plate 3), and the Cape Arago 7.5′ quadrangle (Plate 4) at a scale of 1:24,000. These maps refine our understanding of geologic conditions that control the distribution, quantity, and quality of groundwater resources, the distribution of terrain susceptible to landslides, the nature of seismic hazards, and the distribution of potential aggregate sources and other mineral resources. The geodatabase provides a basis for future geologic, geohydrologic, and geohazard studies in this part of the southern Oregon coast.


Note: Map plates PDFs are in geospatial PDF format, allowing you to turn on and off layers in the map frame and to find geographic coordinates in the PDF..

geospatial PDF layers fro O-15-04 plates

Plate 1. Geologic map of the Bill Peak 7.5' quadrangle, Coos County, Oregon, scale 1:24,000, 31 x 34 inches

O-14-01, plate 1

Plate 2. Geologic map of the Coquille 7.5' quadrangle, Coos Counties, Oregon, scale 1:24,000, 31 x 34 inches

O-14-01, plate 2


Plate 3. Geologic map of the Bullards and Riverton 7.5' quadrangles, Coos County, Oregon, scale 1:24,000, 41 x 34 inches

O-14-01, plate 3


Plate 4. Geologic map of the Cape Arago 7.5' quadrangle, Coos County, Oregon, scale 1:24,000, 31 x 34 inches

O-14-01, plate 3


Geodatabase folder: Esri ArcGIS v10.1 (SP 1) geodatabase. Detailed metadata is contained in the geodatabase.

Feature dataset:
- GeologicMap dataset
Geodatabase Feature Classes

- Relationship table files hold all of the relationships created to connect or relate the supplemental tables to each other, or to the MapUnitPolys feature class.

Geodatabase projection specifications:

Projection: Lambert_Conformal_Conic
False_Easting: 1312335.958005
False_Northing: 0.000000
Central_Meridian: -120.500000
Standard_Parallel_1: 43.000000
Standard_Parallel_2: 45.500000
Latitude_Of_Origin: 41.750000
Linear Unit: Foot (0.304800)

Geographic Coordinate System: GCS_North_American_1983_HARN
Angular Unit: Degree (0.017453292519943299)
Prime Meridian: Greenwich (0.000000000000000000)
Datum: D_North_American_1983_HARN
Spheroid: GRS_1980
Semimajor Axis: 6378137.000000000000000000
Semiminor Axis: 6356752.314140356100000000
Inverse Flattening: 298.257222101000020000

GIS folder (shp files):

Pamphlet folder: Report text to accompany plates and geodatabase

Plates folder:

Spreadsheets folder: