Vic Camp, San Diego State University, vcamp@sdsu.edu; John Wolff, Washington State University,
jawolff@wsu.edu; Arron Steiner, Washington State University, arron@wsu.edu; Evan Soderberg, Washington
State University, evan.soderberg@wsu.edu; Rachelle Hart, Washington State University,
rachelle.hart@wsu.edu.
Description: The Columbia River Basalt Group is world famous as the best studied
continental flood basalt province on Earth. This two-and-a-half-day field trip to the eastern Columbia
Plateau will focus on the basalt flow sequence, dikes, vents, evolution of the basaltic magmas, and
their relation to the larger Yellowstone Hotspot Province. The locations to be visited are in and
adjacent to the canyon country of southeast Washington, western Idaho, and northeast Oregon, and feature
feeder dikes, near-vent associations, and thick plateau basalt lava sequences. The formations to be
examined include the Imnaha, Grande Ronde, and Wanapum Basalts. The stops are mostly roadside and
involve walking a short distance (no strenuous physical activity). Accommodation is double-occupancy
hotel rooms (single rooms available at extra cost). The trip will depart from and return to Spokane.
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