A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Jacupirangite from Magnet Cove |
|---|---|
| Description | Jacupirangite is a type of ijolite, a term used to refer to any plutonic rock containing nepheline and 30-60% mafic minerals. Jacupirangite is one of the more mafic varieties of ijolite. It is hard to identify minerals in this hand specimen. In thin section this sample appears to be dominated by pyroxene (probably titanaugite). It also contains lesser amounts of nepheline, biotite and magnetite. This sample is 8.5 cm across. |
| Location | USA ▹ Arkansas. Near Magnet Cove. |
| Photographer | Nessa Eull. 2001-05-15. |
| Collection | Ward’s University Rock Collection #123. |
| Key words | jacupirangite, ijolite, nepheline, augite |
| Tech details | 1.09 MB. Hand specimen. Fujifilm FinePix S1Pro digital camera, 60mm AF Nikon micro lens. |
| GeoDIL number | 451 |
 | |