A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Thin section of rhyolite porphyry |
|---|---|
| Description | Rhyolite porphyry in thin section, plain polarized view. Unaltered phenocrysts of sanidine (carlsbad twinning), oligoclase, subordinate quartz (in places corroded) 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 | 1.18 MB. Thin section. Nikon FDX-35. |
| GeoDIL number | 2551 |
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