File:Zoophycos in pelletal glauconite beds (Floyds Knob Bed, Fort Payne Formation, Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 1 (42348902141).jpg
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The Fort Payne Formation of southern Kentucky & Tennessee is a shale and limestone succession of Early Mississippian age. Fossils are common to abundant in many intervals. The unit is dominated by crinoids, which are stalked, sessile, benthic, filter-feeding echinoderms (see: <a href="https://www.flickr.com/photos/jsjgeology/albums/72157647779397286">www.flickr.com/photos/jsjgeology/albums/72157647779397286</a>). Seen here is are weathered & eroded rocks in the Floyds Knob Bed. It is a distinctive horizon in an otherwise gray shale succession in the lower Fort Payne Formation. At this site, the Floyds Knob consists of about 1.5 meters worth of brick red and speckled dark green rocks. The brick red rocks are ferruginous dolostones (= medium gray-brown on fresh, crack surfaces). The speckled dark green rocks are peloidal glauconite and glauconitic limestone beds. Marine body fossils and trace fossils are present, including corals, brachiopods, bryozoans, bivalves, trilobites, ostracods, and crinoids. The radiating, curved structure seen here appears consistent with a Zoophycos trace fossil. Stratigraphy: Floyds Knob Bed, Fort Payne Formation, Osagean Stage, upper Lower Mississippian Locality: roadcut along Route 90, just west of Burkesville, Kentucky, USA (36° 47’ 58.81” North latitude, 85° 22’ 58.64” West longitude) Some info. from: Ettensohn et al. (2012) - The Early-Middle Mississippian Borden-Grainger-Fort Payne delta/basin complex: field evidence for delta sedimentation, basin starvation, mud-mound genesis, and tectonism during the Neoacadian Orogeny. Geological Society of America Field Guide 29: 345-395. |
| Date | |
| Source | Zoophycos in pelletal glauconite beds (Floyds Knob Bed, Fort Payne Formation, Lower Mississippian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 1 |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/42348902141 (archive). It was reviewed on 12 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 04:05, 12 October 2019 | | 4,000 × 3,000 (4.86 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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