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Oregon Water Science Center

Columbia River Basalt Stratigraphy in the Pacific Northwest

In Cooperation with the Oregon Water Resources Department




CRBG Stratigraphic Nomenclature Chart

Importance of Understanding CRBG Stratigraphy

Sources of information



Related Links

Terrence Conlon
(503) 251-3232

Exposure of the Pomona member of the Columbia River Basalt Group in the Umatilla Basin
Wanapum and Grande Ronde Basalt along the Columbia River, Ginkgo State Park, Washington (photograph by Terrence Conlon)


Funding for this compilation of CRBG stratigraphy:

U.S. Geological Survey
Oregon Water Resources Department

Compilation of data:

Terry Tolan and Jon Travis, Kennedy/Jenks Consultants
Ray Wells, Brian Drost, Tiffany Jacklin, and Rick Dinicola, U.S. Geological Survey
Karl Wozniak and Brian Mayer, Oregon Water Resources Department
Rick Ernst, Hart Crowser Inc
Russ Bunker, AMEC Earth & Environmental


Terrence Conlon, Ray Wells, U.S. Geological Survey
Terry Tolan, Kennedy/Jenks Consultants

Website design:

John Williams, Leonard Orzol, Joseph Miller, Terrence Conlon, Danial Polette, Ray Wells, U.S. Geological Survey
Terry Tolan, Kennedy/Jenks Consultants
Karl Wozniak, Oregon Water Resources Department

Collection of borehole cuttings:

A.M. Jannsen Well Drilling Co: Preston Jannsen, Roy Jannsen
BJ Well Services: Steve Moore
Blue Water Drilling Co.: Robert Shelburne
Carpenter Well Drilling: Jody Carpenter
CH2M Hill: Mark Wirjanowicz
Doug Delano
Gilbert Clayton Well Drilling: Gilbert Clayton
Golder Associates: Michael Brown
Ground Water Solutions, Inc.: Jeff Barry, Walter Burt
Harding Drilling Co.: Ray Harding, Mike Harding, Jerry Harding
Larry Burd Well Drilling: Ryan Fullerton, Chad Courtney, Russ Otto
Schneider Equipment Co.: Steve Schneider
Sippel Well Drilling, Inc.: Floyd Sippel
Wallace Well Drilling: Pat Wallace
Skyles Drilling, Inc.: Marvin Skyles
Water Well Developing and Surveys: Ed Brown, Brandon Brown
Westerberg Drilling, Inc.: Steve Stadeli, Byron Stadeli

Oregon Water Science Center Studies Page
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