Roadside Geology of Parts of Walla Walla, Franklin, and Columbia Counties, Washington

by Robert J. Carson and Kevin R. Pogue

Washington State Department of Natural Resources
Division of Geology and Earth Resources
January 1996

This field trip guide covers the geology of some of the areas affected by two catastrophic events: enormous basaltic lava flows of about 17 million years ago and giant glacier outburst floods from about 15,300 years ago.

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If you want to explore further

Roadside geology of Washington
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Geologic field trips in the Pacific Northwest
Swanson, Donald A; Haugerud, Ralph Albert; Geological Society Of America; University Of Washington; Geological Society Of America (Seattle, Washington)); 1994

Washington’s channeled scabland.
J. Bretz 1882-1981.; 1959

Introduction to Washington geology and resources.
Charles D. Campbell; 1962

Geological history of Eastern Washington
Charles A. Stewart; 1922