on madrone wood 3b R. archaea likes depressions
Image by: <a href="https://flickr.com/photos/29750062@N06/6833874685">Richard Droker</a> <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">cc</a> via <a href="https://www.bonesearch.com">BoneSearch</a>