A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Hornblende gabbro, San Diego County, California |
|---|---|
| Description | This is a medium grained dark gray intrusive igneous rock composed primarily of plagioclase (labradorite) and hornblende. Minor augite, magnetite pyrite, and a few other accessories are also present. This specimen is 8.5 cm across. |
| Chronostratigraphy | Cretaceous |
| Geologic province | San Marcos Gabbro |
| Location | USA ▹ California ▹ San Diego. Near Escondido. |
| Photographer | Twyla Baker. 2001-02-15. |
| Collection | Ward’s Collection of Classic North American Rocks #28. |
| Key words | hornblende gabbro, hornblende, gabbro, California |
| Tech details | 1.06 MB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 92 |
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