File:Hematitic sandstone (Newark Supergroup, Upper Triassic to Lower Jurassic; Connecticut Valley, Connecticut, USA) 3.jpg
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English: Sandstone from the Triassic of Connecticut, USA.
The Newark Supergroup is a thick, geographically-widespread stratigraphic unit in eastern USA. It is Late Triassic to Early Jurassic in age and represents sediments and some lava flows that filled up old rift valleys that roughly parallel the 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. This is a terrestrial redbed sample - it's very fine-grained sandstone. The brick red color is from hematite (Fe2O3 - iron oxide). Note the low-angle cross-bedding and truncation surfaces. Stratigraphy: Newark Supergroup, Upper Triassic Locality: unrecorded site in the Connecticut Valley, Connecticut, USA For more info., see: en.wikipedia.org/wiki/Newark_Supergroup |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/41158229254/ |
| 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@N05/41158229254. 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 | | 3,739 × 2,244 (6.24 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/41158229254/ with UploadWizard |
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