| Title | Gabbro, Duluth, Minnesota |
| Description | This gabbro, an intrusive igenous rock from Duluth, Minnesota, is mostly composed of labradorite. Augite is found between plagioclase grains, and also as mantles on altered brownish olivine. This is 9 cm across. |
| Location | USA ▹ Minnesota. Near Duluth. |
| Photographer | Darla Sondrol. 2001-02-15. |
| Collection | Ward’s Collection of Classic North American Rocks #30. |
| Key words | gabbro, Minnesota |
| Tech details | 1.12 MB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 94 |
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