| Abstract: | The direct and secondary effects of rapidly changing climate caused large rivers draining the Atlantic passive margin to incise quickly into bedrock beginning about 35,000 years ago. Measured in samples from bedrock fluvial terraces, 10-beryllium shows that both the Susquehanna and Potomac Rivers incised 10- to 20-meter-deep gorges along steep, convex lower reaches during the last glacial cycle. This short-lived pulse of unusually rapid downcutting ended by 13,000 to 14,000 years ago. The timing and rate of downcutting are similar on the glaciated Susquehanna and unglaciated Potomac Rivers, indicating that regional changes, not simply glacial melt-water, initiated incision. |
| Genre: | Article |
| ProdID: | 70026932 |
| Citation Author: | Reusser, L. J.; Bierman, P. R.; Pavich, M. J.; Zen, E. -A.; Larsen, J.; Finkel, R. |
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| Citation End Page: | 502 |
| Citation Issue: | 5683 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Rapid late pleistocene incision of Atlantic passive-margin river gorges; 2004; Article; Journal; Science; Reusser, L. J.; Bierman, P. R.; Pavich, M. J.; Zen, E. -A.; Larsen, J.; Finkel, R. |
| Citation Start Page: | 499 |
| Citation Volume: | 305 |
| Citation Year: | 2004 |
| Type: | citation/reference |
| Text: | Rapid late pleistocene incision of Atlantic passive-margin river gorges; 2004; Article; Journal; Science; Reusser, L. J.; Bierman, P. R.; Pavich, M. J.; Zen, E. -A.; Larsen, J.; Finkel, R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1126/science.1097780 |
| Date Other: | Thu, 1 Jan 2004 00:00 -0600 |
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