File:Auriferous volcanic rock (Little Annie Mine, Sumitville Mining District, San Juan Mountains, Colorado, USA) 1 (16842742827).jpg

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Auriferous volcanic rock from Colorado, USA. (DMNH 11142, Denver Museum of Nature & Science, Denver, Colorado)

This high-grade gold ore comes from Colorado's Little Annie Mine in the San Juan Mountains. The front face of the rock has been broken along a native gold-filled vein. The host material is Tertiary-aged volcanic rock.

Locality: Little Annie Mine, Summitville Mining District, San Juan Mountains, Colorado, USA
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Source Auriferous volcanic rock (Little Annie Mine, Sumitville Mining District, San Juan Mountains, Colorado, USA) 1
Author James St. John

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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/16842742827. It was reviewed on 6 April 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

6 April 2015

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current20:36, 6 April 2015Thumbnail for version as of 20:36, 6 April 20153,158 × 2,655 (3.57 MB)Jacopo Werther (talk | contribs)Transferred from Flickr via Flickr2Commons

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