File:Fish spine in nonmarine black shale (Cow Branch Formation, Upper Triassic; Route 220 roadcut north of the Dan River, Rockingham County, North Carolina, USA) 2.jpg
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Summary
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English: Fossil fish spine in nonmarine black shale in the Triassic of North Carolina, USA.
The Newark Supergroup is a thick, geographically-widespread stratigraphic unit in eastern America. It is Late Triassic to Early Jurassic in age and represents sediments and some lava flows that filled up old rift valleys roughly paralleling the modern-day Eastern Seaboard of America. The rift basins formed in the Triassic when the ancient Pangaea supercontinent attempted to break apart, but failed. A successful breakup of Pangaea occurred during the Jurassic. Most of the basin-filling rocks are terrestrial redbeds - hematite-rich siliciclastic sedimentary rocks, such as conglomerate, sandstone, siltstone, and shale, deposited in nonmarine environments. Seen here is a nonmarine black shale piece with a fossil fish spine. The original muddy sediments were deposited in a lake in the Dan River Basin (Danville Basin), a half graben rift valley. The rocks are fossiliferous - seen on this visit were conchostracans, ostracods, vertebrate bones, coprolites, an apparent insect wing, a possible insect egg capsule, and plants. Stratigraphy: Cow Branch Formation, Newark Supergroup, Upper Triassic Locality: Dan River North Outcrop - roadcut on the eastern side of north-bound Route 220, just north of the bridge over the Dan River, east of the town of Madison, central Rockingham County, northern North Carolina, USA (36° 23’ 19.25” North latitude, 79° 56’ 27.48” West longitude) For more info., see: en.wikipedia.org/wiki/Newark_Supergroup |
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| Source | https://www.flickr.com/photos/47445767@N05/51371742592/ |
| 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@N05/51371742592. It was reviewed on 16 August 2021 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 | 19:31, 16 August 2021 | | 4,288 × 2,597 (7.94 MB) | Ser Amantio di Nicolao | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51371742592/ with UploadWizard |
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