| Lat / long: | 44.72928, -119.3183 |
| Primary: | Manganese |
| Ore: | Psilomelane |
| Orebody form: | NODULES |
| Operation type: | Unknown |
| Deposit type: | Podiform |
| Production size: | None |
| Development status: | Occurrence |
| Host rock: | Lower John Day Formation |
| Host type: | Tuff |
| Alteration processes: | Clay Alteration |
| MRDS | M014845 |
| DEP | 10032999 |
| Reference | LIBBEY, F. W., AND WAGNER, N. S., 1951 , ORIGIN OF MANGANESE NODULES FOUND NEAR HAMILTON, GRANT COUNTY, OREGON: ODGMI, ORE BIN, NOV., VOL. 13 , NO. 11 , P. 71 |
| Reporter | Lee, W., Bradley, Robin (Walker, George W.), Gray, Jerry J. |