| Abstract: | Streams whose courses are oblique to the joint directions (joint-oblique valleys) tend to erode easily owing to increased corrasion and subsequent undercutting at the upstream intersection of joints. Streams whose courses are parallel and perpendicular (joint-parallel valleys) to the nearly orthogonal joint sets erode by waterfall and plunge-pool formation. Most valleys in the Finger Lakes region are joint-oblique, although some well-developed valleys are joint-parallel. These joint-parallel valleys are usually due to 1) a single deep, pervasive joint whose presence acts as a barrier to lateral expansion of the stream, or 2) erosion along joint zones whose intense fracturing produces weak erosional resistance in the rocks. -from Author |
| Genre: | Article |
| ProdID: | 70012117 |
| Citation Author: | Pohn, H. A. |
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| Citation End Page: | 384 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Zeitschrift fur Geomorphologie |
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| Citation Number Of Pages: | 10 |
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| Citation Search Results Text: | The relationship of joints and stream drainage in flat-lying rocks of south-central New York and northern Pennsylvania.; 1983; Article; Journal; Zeitschrift fur Geomorphologie; Pohn, H. A. |
| Citation Start Page: | 375 |
| Citation Volume: | 27 |
| Citation Year: | 1983 |
| Type: | citation/reference |
| Text: | The relationship of joints and stream drainage in flat-lying rocks of south-central New York and northern Pennsylvania.; 1983; Article; Journal; Zeitschrift fur Geomorphologie; Pohn, H. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 1983 00:00 -0600 |
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