OL_powerpoint.ppt
Amphibole group by-nc-sa: Giant Gingko. Amphibole minerals are found in igneous and metamorphic rocks. Amphibole minerals form needle-like or prism-shaped.
Pyroxene group public domain. Pyroxene is found in extrusive igneous rocks. dacite USGS basalt USGS andesite.
Olivine group by-nc-sa: Doblonaut. Olivine minerals are in igneous rocks. by-nc-sa: Orbital Joe by-nc-sa: Ron Schott peridotite basalt gabbro by-nc-sa:
