Reinterpreted history of latest PleistoceneLake Bonneville: Geologic setting of threshold failure, Bonneville flood, deltas ofthe Bear River, and outlets for two Provo shorelines, southeastern Idaho, USA
Document Type
Contribution to Book
Journal/Book Title/Conference
Geological Society of America Field Guide
Volume
21
Publisher
Geological Society of America
Publication Date
2011
First Page
193
Last Page
220
Abstract
Geologic, geomorphic, and geophysical analyses of landforms, sediments, and geologic structures document the complex history of pluvial Lake Bonneville in northern Cache Valley, NE Great Basin, and shows that the outlet of Lake Bonneville shifted ~20 km south after the Bonneville flood. The Riverdale normal fault offsets Bonneville deposits, but not younger Provo deposits ~25 km southeast of Zenda, Idaho. Rapid changes in water level may have induced slip on the Riverdale fault shortly before, during, or after the Bonneville flood. Although other processes may have played a role, seismicity might have been the main cause of the Bonneville flood.
Recommended Citation
Janecke, S.U., and Oaks, R.Q., Jr., 2011, Reinterpreted history of latest Pleistocene Lake Bonneville: Geologic setting of threshold failure, Bonneville flood, deltas of the Bear River, and outlets for two Provo shorelines, southeastern Idaho, USA, in Evans, J.P., and Lee, J., eds., Geologic Field Trips to the Basin and Range, Rocky Mountains, Snake River Plain, and Terranes of the U.S. Cordillera: Geological Society of America Field Guide 21, p. 193–220, doi:10.1130/2011.0021(09).
