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

Tuesday, March 1, 2016

airplane geology

On your next flight --find out the geology of flyover country/

rocks from above

Harry Allen