Wikimedia_061321_Glacierrock1a

Rock Glacier

A rock glacier in the Chugach, Alaska mountains. Public Domain

https://commons.wikimedia.org/wiki/File:Glacierrock1.gif
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code

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