Xenolith from San Carlos, Arizona. 8-13.

Description

The dark colored rock is basalt. Included in the basalt are green xenoliths -- pieces of the ultramafic mantle. If you zoom in and look at the xenoliths, you can see three minerals. The olive green mineral is olivine -- olivine makes up most of the xenoliths. The relatively rare brighter (emerald) green mineral is chrome diopside, and the darker sort of greyish mineral is orthopyroxene. Masked bg, highest setting alignmnet, DENSE CLOUD high, standard for others