A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Muscovite, Hill City, South Dakota |
|---|---|
| Description | This sample of muscovite is from a mine near Hill City, South Dakota. It is about 6 cm across. The sample also contains small amounts of cassiterite, but the cassiterite is hard to see. This rock has been described as a greisen, meaning that it formed by hydrothermal alteration due to water vapor containing fluorine. |
| Geologic province | Black Hills |
| Location | USA ▹ South Dakota. Near Hill City. Black Hills. |
| Photographer | Shannon Heinle. 2001-02-09. |
| Collection | University of North Dakota Mineralogy Collection. |
| Key words | muscovite, South Dakota, Black Hills, cassiterite, greisen |
| Tech details | 722 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 39 |
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