A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Ijolite, McClure Mountains, Colorado, USA |
|---|---|
| Description | This is a dark gray medium grained intrusive igneous rock of Precambrain age. The major minerals are pyroxene (aegirine), biotite and nepheline. Minor orthoclase, titanite (sphene) and apatite are also present. This sample is about 11 cm across. |
| Chronostratigraphy | Late Precambrian |
| Location | USA ▹ Colorado. McClure Mountains. |
| Photographer | Darla Sondrol. 2001-02-08. |
| Collection | Ward’s Collection of Classic North American Rocks #19. |
| Key words | ijolite, Precambrian, Colorado |
| Tech details | 1.14 MB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 30 |
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