Serpentine Subgroup from Contra Costa County, California, USA
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
USGS MRDS database (2005), loc. file ID #10029552. | |
(2005) Mineral Resources Data System (MRDS), US Geological Survey. |