A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Nepheline syenite (malignite) |
|---|---|
| Description | This mafic nepheline syenite is an intrusive igneous rock. The sample is 10 cm in longest dimension. It contains 25% nepheline and approximately equal amounts of pyroxene (aegirine) and potassium feldspar (orthoclase). Minor amphibole and biotite are also present. The name Malignite is derived from the Maligne River in Ontario, Canada. |
| Location | USA ▹ Montana ▹ Park |
| Photographer | Joseph Hartman. 2001-02-08. |
| Collection | Ward’s Collection of Classic North American Rocks #18. |
| Key words | nepheline, syenite, malignite, Montana |
| Tech details | 1.18 MB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 31 |
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