Cosmogenic 3He ages and frequency of late Holocene debris flows from Prospect Canyon, Grand Canyon, USA
Cerling TE, Webb RH, Poreda RJ, Rigby AD, Melis TS. 1999. Cosmogenic 3He ages and frequency of late Holocene debris flows from Prospect Canyon, Grand Canyon, USA. Geomorphology. 27(1-2):93-111
"Lava Falls Rapid, which was created and is maintained by debris flows from Prospect Canyon, is the most formidable reach of whitewater on the Colorado River in Grand Canyon and is one of the most famous rapids in the world. Debris flows enter the Colorado River at tributary junctures, creating rapids. The frequency of debris flows is an important consideration when management of regulated rivers involves maintenance of channel morphology. We used cosmogenic Grand Canyon. The deposit, which has a 25-m escarpment caused by river reworking, crossed the Colorado River and raised its base level by 30 m for an indeterminate although likely short period. We mapped depositional surfaces of 11 debris flows that occurred after 3 ka. Two deposits inset against the highest deposit yielded " [from ScienceDirect online database]
- Type
- Journal Article
- Authors
- Cerling, Thure; Webb, Robert; Poreda, Robert; Rigby, A; Melis, Theodore
- Units
- GRCA
- Keywords
- dating (geologic), Debris Flows, Geomorphology, Holocene, Prospect Canyon AZ