California-
Devils Post Pile
Virtual
Geology Field Trips
Virtual Geology
Museum
Geology Home Page
Roger Weller, geology instructor
wellerr@cochise.edu copyright 2008-R.Weller
columns are porphyritic basalt
evidence of creep
hockey stick trees:
A
B
Photos are copyright free for
non-commercial educational uses.
Just credit photos to R.Weller/Cochise
College.