File:Dugway Geode (Juab County, Utah, USA) 2 (34581522545).jpg

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This shows the interior of a geode. Geodes are small to large, subspherical to irregularly-shaped, crystal-lined cavities in rocks. They form when water enters a void in a host rock and precipitates crystals. The most common geode-lining mineral is quartz.

This Utah geode comes from the Dugway Geode Beds, which occur in Miocene-aged, rhyolitic volcanic rocks. The geode is lined with agate (= thinly layered portion) covered with small quartz crystals.

Locality: Dugway Geode Beds, near the northern margin of Juab County, western Utah, USA (vicinity of 39 53' 37.78" North latitude, 113 08' 13.12" West longitude)
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Source Dugway Geode (Juab County, Utah, 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@N05/34581522545 (archive). It was reviewed on 10 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

10 October 2019

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Date/TimeThumbnailDimensionsUserComment
current07:14, 10 October 2019Thumbnail for version as of 07:14, 10 October 20192,820 × 2,394 (4 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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