| Abstract: | Enigmatic tubular trace fossils up to eight meters long occur in the Lower Pennsylvanian Middlesboro Member of the Lee Formation. Two morphotypes occur: type 1 trace fossils are plain, smooth, vertical, nonbranching, parallel-walled, tubular structures, type 2 trace fossils branch, have walls with faint vertical striations, regularly or irregularly spaced nodes, and funnel-shaped terminations. Sandstone casts filling type 2 structures have helical spiral morphology, and, in rare individuals, faint meniscate fills have been observed. Both trace-fossil morphotypes have poorly cemented wall linings containing framboidal pyrite, amorphous carbon, quartz sand, and poorly preserved fecal material. The trace fossils occur in a massive, structureless, channel-form sandstone, originating at the contact between a channel lag and the overlying massive fill representing a barrier island transgressing an estuarine facies. Origin of these structures is uncertain. -from Authors |
| Genre: | Article |
| ProdID: | 70016524 |
| Citation Author: | Wnuk, C.; Maberry, J. O. |
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| Citation End Page: | 450 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Paleontology |
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| Citation Number Of Pages: | 11 |
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| Citation Search Results Text: | Enigmatic eight-meter trace fossils in the Lower Pennsylvanian Lee sandstone, central Appalachian basin, Tennessee; 1990; Article; Journal; Journal of Paleontology; Wnuk, C.; Maberry, J. O. |
| Citation Start Page: | 440 |
| Citation Volume: | 64 |
| Citation Year: | 1990 |
| Type: | citation/reference |
| Text: | Enigmatic eight-meter trace fossils in the Lower Pennsylvanian Lee sandstone, central Appalachian basin, Tennessee; 1990; Article; Journal; Journal of Paleontology; Wnuk, C.; Maberry, J. O. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 1990 00:00 -0600 |
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