A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Macdonaldite |
|---|---|
| Description | Macdonaldite is a silicate with the chemical formula BaCa4Si16O36(OH)2·10(H2O). Macdonaldite forms in sanbornite-bearing metamorphic rocks near a granodiorite contact. Macdonaldite is found in the Big Creek-Rush Creek area, Fresno Co., and on Trumbull Peak, near Incline, Mariposa Co., California, USA. It was named for Gordon Andrew Macdonald (1911-1978) an American volcanologist from the University of Hawaii. This sample is approximately 6 cm. |
| Location | USA ▹ California ▹ Fresno. Near Rush Creek. |
| Photographer | Shannon Heinle. 2002-01-22. |
| Collection | University of North Dakota Mineralogy Collection #1903. |
| Key words | macdonaldite, silicate, fresno, california, mariposa |
| Tech details | 289 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 2174 |
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