New maps offer modern look at South Coast geology | News

COOS COUNTY – New mapping of the Oregon Coast improves understanding of geologic resources and hazards in an area that hasn’t been mapped in decades.

The Oregon Department of Geology and Mineral Industries released geological maps of the Coos County coast between Bandon, Coquille and Sunset Bay on Dec. 30. The last geological mapping of the coastal county of Coos took place in the 1970s.

The new maps were made with the latest technology, as well as modern knowledge of the geohazards – such as an earthquake, tsunami and landslides in the Cascadia subduction zone – facing coastal communities .

“For the southern Oregon coast, it’s especially important to know more about landslide-prone terrain, as well as the nature of the seismic hazard,” said geologist Tom Wiley. by DOGAMI. “This mapping and data are essential to study these and other risks.”

The new mapping is part of a multi-year project, launched in 2012, to map the Oregon coast from the California border north to Coos Bay. The effort is supported in part by the US Geological Survey STATEMAP component of the National Cooperative Geologic Mapping Program.

Beaches are the best places to get a glimpse of the region’s geology, Wiley said. See state parks, including Shore Acres State Park, where erosion has shaped a shoreline with sharp headlands, reefs, islands and secluded coves that are dramatically different from any other area on the side. The predominant rock unit, the Coaledo Formation, contains numerous marine fossils.

“Geological 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 contains map plates, report, geodatabase, GIS files and spreadsheets. The publication is available free of charge. Download here:

Comments are closed.