| 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…