The relationship of joints and stream drainage in flat-lying rocks of south-central New York and northern Pennsylvania.
Zeitschrift fur Geomorphologie
By: H. A. Pohn
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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
Suggested Citation
Pohn, H., 1983, The relationship of joints and stream drainage in flat-lying rocks of south-central New York and northern Pennsylvania.: Zeitschrift fur Geomorphologie, v. 27, no. 3, p. 375-384.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The relationship of joints and stream drainage in flat-lying rocks of south-central New York and northern Pennsylvania. |
| Series title | Zeitschrift fur Geomorphologie |
| Volume | 27 |
| Issue | 3 |
| Year Published | 1983 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Zeitschrift fur Geomorphologie |
| First page | 375 |
| Last page | 384 |