| Abstract: | Crustal structure of the southern Appalachians and adjacent Interior Low Plateaus in Tennessee is derived from seismic-refraction measurements observed by the U.S. Geological Survey in 1965 along reversed lines, normal (NW-SE) and parallel (NE-SW) to the structure of the Appalachian Highlands‘ major geologic divisions. Its easternmost part is located approximately 80 km southwest of the westernmost part of the COCORP seismic-reflection traverse within the Blue Ridge province. The velocity-depth models derived for both observational directions consist of three crustal layers with surprisingly high velocities, being about 6.1-6.2 km/s in the upper crust down to 7-10 km depth, 6.7-6.8 km/s for the middle crust between about 17 and 34 km and varying from 7.1 to 7.4 km/s for the lower crust at about 40-47 km depth. The boundaries between the three crustal layers as well as the crust-mantle boundary are transition zones of up to 11 km thickness. Similar to old orogens in other parts of the earth, the main result is a thick crust, at places in excess of 50 km, with high average velocity and a broad crust-mantle transition zone. ?? 1984. |
| Genre: | Article |
| ProdID: | 70013892 |
| Citation Author: | Prodehl, C.; Schlittenhardt, J.; Stewart, S. W. |
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| Citation End Page: | 76 |
| Citation Issue: | 1-2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Tectonophysics |
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| Citation Number Of Pages: | 16 |
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| Citation Search Results Text: | Crustal structure of the Appalachian Highlands in Tennessee; 1984; Article; Journal; Tectonophysics; Prodehl, C.; Schlittenhardt, J.; Stewart, S. W. |
| Citation Start Page: | 61 |
| Citation Volume: | 109 |
| Citation Year: | 1984 |
| Type: | citation/reference |
| Text: | Crustal structure of the Appalachian Highlands in Tennessee; 1984; Article; Journal; Tectonophysics; Prodehl, C.; Schlittenhardt, J.; Stewart, S. W. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1984 00:00 -0600 |
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