File:Chlorite schist (Precambrian; Michigamme Mine area, Upper Peninsula of Michigan, USA) 1.jpg
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| Description |
English: Chlorite schist from the Precambrian of Michigan, USA.
Schist is a foliated, intermediate- to high-grade metamorphic rock. It varies considerably in appearance, but has 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). The greenish-gray material in this sample is chlorite. Acicular sprays of amphibole (apparently grunerite) are present, plus small patches of iron sulfide. Geologic unit: possibly from a metamorphosed intrusion in the Negaunee Iron-Formation (if so, is Paleoproterozoic, 1.85 to 1.86 Ga) Locality: sample from disturbed mine waste rock pile/road construction talus pile near the Michigamme Mine (Mt. Shasta Mine), near the northwestern corner of Lake Michigamme, northeastern side of the town of Michigamme, Upper Peninsula of Michigan, USA (vicinity of 46° 32’ 18.87" North latitude, 88° 05’ 40.50" West longitude) |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/49990807317/ |
| 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@N05/49990807317. 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 | 16:18, 10 August 2021 | | 3,082 × 1,905 (3.98 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/49990807317/ with UploadWizard |
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