A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Thin section of rhyolite porphyry |
|---|---|
| Description | Rhyolite porphyry in thin section, cross polarized view. Unaltered phenocrysts of sanidine (carlsbad twinning), oligoclase, subordinate quartz (in places corroeded) and minor biotite are set in a turbid fine-grained equigranular matrix of quartz potash feldspar, and specks of magnetite and hematite. The plag phenocrysts tend to be agglomerated. |
| Chronostratigraphy | Tertiary |
| Location | USA ▹ Colorado ▹ Chaffee |
| Photographer | Darla Sondrol. 2002-04-02. |
| Collection | Ward’s Collection of Classic North American Rocks #12. |
| Key words | rhyolite porphyry, rhyolite, Colorado, thin section |
| Tech details | 771 KB. Thin section. Nikon FDX-35. |
| GeoDIL number | 2552 |
 | |