Here is a post on the Pozolan which could be mined in Skull Valley
Arizona Geology post
Harry Allen
Thursday, August 31, 2017
Tuesday, May 23, 2017
Thursday, February 16, 2017
Grand Falls are flowing
Photos from Daryl and Karen Austermiller's flight over the falls. Note the black lava damn that caused the Little Colorado River to flow around it and form the falls as it returned to its former river bed.
Harry Allen
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