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Pace of landscape evolution in the Sierra Nevada, California, revealed by cosmogenic dating of cave sediments
| Content Provider | Semantic Scholar |
|---|---|
| Author | Stock, Greg M. Anderson, R. Stewart Finkel, Robert C. |
| Copyright Year | 2004 |
| Abstract | We report 26 Al/ 10 Be based ages of Sierra Nevada caves that constrain detailed late Pliocene and Quaternary river incision his- tories for five river canyons. Rapid incision of ! 0.2 mm/yr from 2.7 to ca. 1.5 Ma slowed markedly to ! 0.03 mm/yr thereafter, likely reflecting the combined effects of a transient erosional re- sponse to Pliocene rock uplift and periodic mantling of riverbeds with glacially derived sediment in the late Quaternary. While ! 400 m of incision has occurred in the past 2.7 m.y., outpacing interfluve erosion and thereby increasing the local relief, canyons as deep as 1.6 km existed prior to that time. These new erosion rates strength- en the case for tectonically driven late Cenozoic uplift. |
| Starting Page | 193 |
| Ending Page | 196 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| DOI | 10.1130/G20197.1 |
| Volume Number | 32 |
| Alternate Webpage(s) | http://cires1.colorado.edu/people/jones.craig/SNEP/Stock2004.pdf |
| Alternate Webpage(s) | http://www.geo.arizona.edu/~reiners/Stock2004_burialdates.pdf |
| Alternate Webpage(s) | https://doi.org/10.1130/G20197.1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
