A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Monzonite, from near Silverton , San Juan County, Colorado |
|---|---|
| Description | This purplish gray specimen contains primarily plagioclase, orthoclase, and greenish hornblende with small amounts of quartz. It is about 10 cm across. |
| Chronostratigraphy | Tertiary (Miocene) |
| Location | USA ▹ Colorado ▹ San Juan. Near Silverton. |
| Photographer | Joseph Hartman. 2001-02-14. |
| Collection | Ward’s Collection of Classic North American Rocks #22. |
| Key words | monzonite, Colorado |
| Tech details | 916 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 72 |
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