A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Olivine-pyroxene andesite, Fish Lake, Oregon |
|---|---|
| Description | Typical andesites are extrusive igneous rocks containing plagioclase and one or more of the mafic minerals clinopyroxene, orthopyroxene, or hornblende. Although not typical, olivine is also present in some andesites. Andesites are commonly porphyritic. The fine groundmass between phenocrysts contains the same minerals that are present as phenocrysts, and may also contain quartz. |
| Location | USA ▹ Oregon ▹ Jackson. Near Fish Lake. |
| Photographer | Nessa Eull. 2001-05-15. |
| Collection | Ward’s University Rock Collection #122. |
| Key words | andesite, Oregon |
| Tech details | 738 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera, 60mm Nikon AF micro lens. |
| GeoDIL number | 450 |
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