File:Schist (Hartland Formation, Cambrian-Ordovician; Manhattan, New York State, USA) 5.jpg
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Summary
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| Description |
English: Schist from the Lower Paleozoic of New York State, USA. (~8.2 centimeters across at its widest)
Manhattan Island, in the heart of New York City (www.flickr.com/photos/photosixun/38123209764/in/photostre...), seems prima facie an unlikely place for seeing geology. However, nice rock outcrops occur in city parks, including the largest, Central Park. The bedrock in Manhattan is principally high-grade metamorphic rocks, such as gneisses, schists, and marbles. The rock seen here is a schist, a foliated, intermediate- to high-grade metamorphic rock. Schists vary considerably in appearance, but have macroscopic crystals and chunky weathering (in contrast with slate and phyllite, which have microscopic crystals and weather into thin, flat pieces or slightly chunky flat pieces). This piece is unusual in having specific provenance preserved - it's a bedrock sample from beneath Carnegie Hall (www.flickr.com/photos/edcnyc/49107647922/in/photostream/l...). The sample consists principally of biotite mica, muscovite mica, and quartz. Stratigraphy: Hartland Formation, Cambrian-Ordovician Locality: bedrock below Carnegie Hall (= 881 Seventh Avenue, at the eastern corner of the 7th Avenue-West 56th Street intersection), 2.5 blocks southwest of the southern end of Central Park, central Manhattan Island, New York City, far-southeastern New York State, USA (40º 45' 54.46" North latitude, 73º 58' 48.00" West longitude) Provenance: collected 2002 by a construction worker during renovation of Carnegie Hall |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/51114810805/ |
| 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@N05/51114810805. It was reviewed on 19 April 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 | 14:03, 19 April 2021 | | 3,232 × 1,417 (3.08 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51114810805/ with UploadWizard |
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