Rhyolite from Central Mining District (Bayard District), Grant County, New Mexico, USA
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
Wright, Ira (1919) Private report to Black Hawk mines. |
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
Wright, Ira (1919) Private report to Black Hawk mines. |