Browse Items (264 total)

Have a look at the ferruginous arenite sandstone (L326) in the 1A Reference Series.

Common alteration minerals include clays for plagioclase, serpentine for olivine, and chlorite for ferromagnesian minerals such as biotite.

Have a look at the rhyolite glass (L113) in the 1A Reference Series.

Have a look at the amygdaloidal basalt (L161) in the 1A Reference Series.

Have a look at the granodiorite (L120) for anhedral quartz, biotite and plagioclase.

Compare with isotropic.