File:Sandstone (Pinehall Formation, Upper Triassic; Oak Ridge Farms Road outcrop, Pittsylvania County, Virginia, USA) 1.jpg
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| Description |
English: Immature sandstone with granules from the Triassic of Virginia, 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 an immature sandstone from the easternmost Dan River Basin (Danville Basin), a half graben rift valley. Gravel and sand (now conglomerate and sandstone) were deposited adjacent to the half graben's eastern boundary fault, which is a major normal fault. Stratigraphy: Pinehall Formation, Newark Supergroup, Upper Triassic Locality: loose piece from roadcut along the northbound exit ramp from Route 58 to Oak Ridge Farms Road, just west of Vandola & west of Danville, southern Pittsylvania County, southern Virginia, USA (36° 34’ 30.09” North latitude, 79° 31’ 20.13” West longitude) For more info., see: en.wikipedia.org/wiki/Newark_Supergroup |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/49976229512/ |
| 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@N05/49976229512. It was reviewed on 10 August 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 15:46, 10 August 2021 | | 2,834 × 2,242 (5.05 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/49976229512/ with UploadWizard |
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