Rock group | Igneous |
Classification | Extrusive/plutonic |
Composition | Felsic |
Texture | Glassy Aphanitic Porphyritic |
Intrusive counterpart | Granite |
Common minerals | Quartz Sanidine Plagioclase feldspar Biotite Hornblende |
Rhyolite GigaPans
Rhyolite in Thin Section
Thin Section GigaPans
Porphyritic rhyolite, plane polars
Porphyritic rhyolite, crossed polars

Porphyritic Rhyolite, Plane Polars
Porphyritic rhyolite in plane polarized light. Magnification: 40x Click here to watch porphyritic rhyolite rotating in crossed polars: https://youtu.be/F186c…

Porphyritic Rhyolite, Crossed Polars
Porphyritic rhyolite in cross polarized light. Magnification: 40x Click here to watch porphyritic rhyolite rotating in plane polars: https://youtu.be/l0J3RCG…