File:Sundance Laccolith (Eocene, ~46-50 Ma; Sundance Mountain, Sundance, Wyoming, USA) 1 (21259585155).jpg

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Sundance Mountain - an igneous laccolith in the Eocene of Wyoming, USA.

Several igneous intrusions occur in the vicinity of the town of Sundance in northeastern Wyoming. The intrusion shown above is Sundance Mountain, which consists of Eocene-aged (~46-50 million years old) porphyritic quartz latites. The rocks here have also been characterized as porphyritic subalkalic rhyolites.

Locality: Sundance Mountain, 1 mile south of the town of Sundance, southeast-central Crook County, northeastern Wyoming, USA
Date
Source Sundance Laccolith (Eocene, ~46-50 Ma; Sundance Mountain, Sundance, Wyoming, USA) 1
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@N05/21259585155 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

6 December 2019

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Date/TimeThumbnailDimensionsUserComment
current02:01, 6 December 2019Thumbnail for version as of 02:01, 6 December 20194,000 × 1,363 (3.28 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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