Introduction

This guidebook was produced for the joint Cordilleran (100th Annual) and the Rocky Mountain (56th Annual) Section Meeting of the Geological Society of America in Boise, Idaho, May 1–7, 2004. We are most fortunate in assembling people who have done recent investigations in Idaho, eastern Oregon, and Nevada to write this guidebook and lead the trips. The trips and the guidebook involved authors, leaders, and editors hailing from many universities of the Cordilleran and Rocky Mountain region, the Oregon Department of Mines and Geology, the Idaho Geological Survey, the National Park Service, the U.S. Bureau of Land Management, and the U.S. Geological Survey. We hope that this cooperative effort to provide new geoscience information will be useful to educators, researchers, government, students, and all those who are interested in the earth and water that underlies this region.
The editors thank the many individuals who served as reviewers for this impressive group of field trip guides.

Kathy Haller, U.S. Geological Survey, Denver, Colorado
Spencer Wood, Boise State University, Boise, Idaho

May 2004

MAP