Cochise College Roger Weller,
geology instructor

wellerr@cochise.edu
Geology Home Page
copyright 2005-R.Weller
obsidian eruption
talus slope of obsidian blocks
blocks of obsidian
flow banded obsidian and rhyolite:
A
B
C
D
E
pumice
volcanic cones:
A
B
water filled volcanic crater
Photos are copyright free non
non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.