Image: Gips Sanduhr - Great Salt Plains, Oklahoma, USA
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Original image (1,850 × 1,100 pixels, file size: 1.12 MB, MIME type: image/jpeg)
Description: Gypsum, special variety: Hourglass-Gypsum (embedded sand in type of an hourglass) - Exposed in the Mineralogical Museum, Bonn, Germany
Title: Gips Sanduhr - Great Salt Plains, Oklahoma, USA
Credit: Own work
Author: Ra'ike (see also: de:Benutzer:Ra'ike)
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: https://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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