File:Chromitic talcose serpentinite (Shetland Ophiolite Complex, ~425-500 Ma; Unst, Shetland Islands, North Sea) (14819238911).jpg
![File:Chromitic talcose serpentinite (Shetland Ophiolite Complex, ~425-500 Ma; Unst, Shetland Islands, North Sea) (14819238911).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Chromitic_talcose_serpentinite_%28Shetland_Ophiolite_Complex%2C_~425-500_Ma%3B_Unst%2C_Shetland_Islands%2C_North_Sea%29_%2814819238911%29.jpg/800px-Chromitic_talcose_serpentinite_%28Shetland_Ophiolite_Complex%2C_~425-500_Ma%3B_Unst%2C_Shetland_Islands%2C_North_Sea%29_%2814819238911%29.jpg?20191130170752)
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[edit]DescriptionChromitic talcose serpentinite (Shetland Ophiolite Complex, ~425-500 Ma; Unst, Shetland Islands, North Sea) (14819238911).jpg |
Chromitic talcose serpentinite (6.4 cm across), originally a ~basal crustal dunite peridotite. This is from an ophiolite complex (Shetland Ophiolite Complex; a.k.a. Unst Ophiolite Complex) exposed on the island of Unst in the northeastern Shetland Islands (in the North Sea, between Scotland & Norway). The rocks in the area represent ~basal crustal rocks metamorphosed during the Caledonian Orogeny (~425-500 million years ago). Published research indicates that the original rocks were from a late Neoproterozoic-Cambrian intracontinental, ocean-floored rift basin. Locality: abandoned quarry on island of Unst, northeastern Shetland Islands, North Sea. Ophiolites are fragments of oceanic lithosphere (basaltic crust + uppermost mantle) that have been metamorphosed and plastered onto the edges of continental lithospheric plates by obduction (the opposite of subduction). |
Date | |
Source | Chromitic talcose serpentinite (Shetland Ophiolite Complex, ~425-500 Ma; Unst, Shetland Islands, North Sea) |
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@N05/14819238911 (archive). It was reviewed on 30 November 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
30 November 2019
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current | 17:07, 30 November 2019 | ![]() | 1,293 × 960 (187 KB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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