File:Brecciated magnetite-quartz-jasper meta-BIF, Atlantic City Iron Mine WY.jpg

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Brecciated magnetite-quartz-jasper meta-BIF (banded iron formation) (7.3 cm across at its widest) from the Precambrian of Wyoming, USA.

Stratigraphy: Goldman Meadows Formation, upper Mesoarchean, 2.87 Ga; metamorphism at 1.4 Ga, during the early Mesoproterozoic.

Locality: Atlantic City Iron Mine, northwestern side of Rt. 28, southwestern side of South Pass, Wind River Range, west-central Wyoming, USA.
Date
Source Brecciated magnetite-quartz-jasper meta-BIF (Goldman Meadows Formation, Mesoarchean, 2.87 Ga; Atlantic City Iron Mine, southwestern side of South Pass, Wind River Range, west-central Wyoming, USA)
Author James St. John

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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15026092788. It was reviewed on 15 September 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

15 September 2014

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current19:13, 12 September 2014Thumbnail for version as of 19:13, 12 September 20143,732 × 2,448 (3.48 MB)Tillman (talk | contribs)Transferred from Flickr via Flickr2commons

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