Thursday, August 31, 2017

Mining the Skull Valley Tuff

Here is a post on the Pozolan which could be mined in Skull Valley

Arizona Geology post

Harry Allen

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

Thursday, October 20, 2016

Evidence for an Old Canyon

the Geology Page presented some of the evidence for an Old Canyon


The debate continues,

Harry Allen

Saturday, September 10, 2016

Wednesday, March 23, 2016

Thursday, March 17, 2016

Geo tour of Northern Arizona

The Arizona  Geologic Survey posted a  Geo tour of Northern Arizona -- A virtual Field trip


Check it out

Harry Allen