Guidebook Menu: Guidebook Mainpage About the Guidebook Preface Stratigraphy & Structure Cenozoic Tectonism Snake River Plain Quaternary Geology Regional Geology Acknowledgements -----Geology Menu: Geology Basics Eastern Idaho uidebook Geology of SE Idaho The Great Rift Snake River Plain Topography & Hotspot Batholith Accreted Terrane Earthquakes Fossils Rocks Soils Caves Glaciers