File:Fossil scallop in ironstone concretion (Nancy Member, Borden Formation, Lower Mississippian; Lewis County, Kentucky, USA) 2 (35592669622).jpg
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Summary
| Description |
Fossiliferous ironstone concretion from the Mississippian of Kentucky, USA. This is a fossil pectinoid bivalve (scallop) in a concretion derived from a gray shale succession in Kentucky's Borden Formation. The Borden is an ancient delta deposit. The sediments were derived from erosion of mountains to the east, in what is now the Appalachians. The Appalachians of eastern America formed as a result of three separate mountain-building events during the Paleozoic: 1) Taconic Orogeny (Ordovician to Silurian); 2) Acadian Orogeny (Silurian to Devonian); and 3) Allegheny Orogeny (Carboniferous). Borden Formation sediments formed as the ancient Acadian Mountains eroded. Considerable amounts of sand, silt, and mud were washed down ancient rivers from the east and northeast and were deposited in deltaic environments - this was the Borden Delta. Classification: Animalia, Mollusca, Bivalvia, Pteriomorphia, Pterioida, Pectinoidea Stratigraphy: Nancy Member, Borden Formation, Lower Mississippian Locality: AA Highway roadcut, south-southwest of Buena Vista & east-southeast of Vanceburg, just northeast of the Rt. 9-Rt. 10 split (= stop 7b of Potter et al., 1991), northern Lewis County, northeastern Kentucky, USA (38° 34' 49.49" North latitude, 83° 16' 22.09" West longitude) Reference cited: Potter et al. (1991) - Geology of the Alexandria-Ashland Highway (Kentucky Highway 546), Maysville to Garrison. Joint Field Conference of the Geological Society of Kentucky and Ohio Geological Society, September 26-28, 1991. |
| Date | |
| Source | Fossil scallop in ironstone concretion (Nancy Member, Borden Formation, Lower Mississippian; Lewis County, Kentucky, USA) 2 |
| 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@N05/35592669622 (archive). It was reviewed on 8 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:58, 8 October 2019 | | 1,899 × 1,311 (2.35 MB) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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