File:White calcitic marble (Yule Marble, Middle Miocene, 12 Ma; Marble, Gunnison County, Colorado, USA) 2 (15068007999).jpg

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White calcitic marble from the Miocene of Colorado, USA. (6.2 centimeters across at its widest)

This beautiful, pure white calcitic marble is the "official state rock" of Colorado. Marble is a monomineralic, intermediate- to high-grade metamorphic rock with a crystalline texture. It forms by regional or contact metamorphism of limestone.

Geologic unit & age: Yule Marble, formed by contact metamorphism of the Mississippian-aged Leadville Limestone by intrusion of the Treasure Mountains Granite, Middle Miocene, 12 Ma.

Locality: at or near the town of Marble, northern Gunnison County, western Colorado, USA.
Date
Source White calcitic marble (Yule Marble, Middle Miocene, 12 Ma; Marble, Gunnison County, Colorado, USA) 2
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/15068007999 (archive). It was reviewed on 1 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

1 December 2019

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Date/TimeThumbnailDimensionsUserComment
current08:54, 1 December 2019Thumbnail for version as of 08:54, 1 December 20193,584 × 1,892 (1.26 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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