RockWoofSketch map
Woof’s favorite find
Grover Test Site
We picked it because its USGS record mentions 1 of the minerals on our cards and 1 of our card minerals overall. That ties with 4 other site(s), so we broke the tie by mine status (past producers first), then USGS record quality, then name. USGS lists it as past producer for Uranium. Minerals mentioned: Pyrite. Approx. location 40.822, -104.267. USGS record.
Ask first: a USGS record doesn’t mean you can visit. Find out who owns the land and get permission before collecting.
Field cards: what kind of sites?
The mineral was noted here, without development.
Produced ore or material at some point in the past.
Was producing when the record was made.
Explored or test-dug, with no recorded production.
Status not recorded.
Status terms come from USGS MRDS records.
Mineral cards
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
5 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
No individual minerals are listed in these records.
Commodities
Uranium 35Vanadium 2Iron 2Manganese 1Silica 1Sites (first 40)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.772, -104.653 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.772, -104.683 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.751, -104.692 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.750, -104.644 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.758, -104.710 |
| Indian Creek | Uranium | — | Occurrence | 40.820, -104.935 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.815, -104.653 |
| King Solomon | Uranium, Vanadium | — | Occurrence | 40.703, -104.649 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.765, -104.730 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.672, -104.531 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.722, -104.530 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.650, -104.501 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.746, -104.400 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.650, -104.501 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.704, -104.668 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.717, -104.668 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.781, -104.444 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.694, -104.320 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.681, -104.308 |
| Pawnee Buttes N.E. Deposit | Uranium | — | Occurrence | 40.633, -104.040 |
| Grover Test Site | Uranium | — | Past Producer | 40.822, -104.267 |
| Hyland Pit | Uranium | — | Occurrence | 40.711, -104.620 |
| Eastman Basin Occurrence | Uranium | — | Occurrence | 40.717, -104.649 |
| Keota Mine | Uranium | — | Prospect | 40.722, -104.021 |
| Sand Creek Deposit | Uranium | — | Occurrence | 40.732, -104.476 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.815, -104.701 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.736, -104.710 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.772, -104.663 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.772, -104.701 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.707, -104.653 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.746, -104.539 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.622, -104.539 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.629, -104.549 |
| Wild Horse | Uranium | — | Occurrence | 40.733, -104.457 |
| Unnamed Uranium Occurrence | Uranium | — | Occurrence | 40.760, -104.416 |
| Grover | — | — | Past Producer | 40.820, -104.287 |
| Furney Manganese Prospect | Manganese | — | Past Producer | 40.974, -104.157 |
| Pawnee Buttes N.E. | — | — | Past Producer | 40.632, -104.038 |
| Keota & Iliff Silica Deposits | Silica | — | Past Producer | 40.693, -103.947 |
| Great Western Sugar Co | Iron | — | Producer | 40.526, -104.708 |
Fossil collections
The Paleobiology Database lists 29 fossil collection records in Weld County. These are research records, not public dig sites.
Nearby counties
Larimer County · Morgan County · Boulder County · Logan County · Denver County
Colorado mineral guides
- Beryl in Colorado
- Tourmaline in Colorado
- Quartz in Colorado
- Garnet in Colorado
- Gold in Colorado
- Mica in Colorado
Back to all Colorado counties.
How we built this page: we counted named sites in the USGS Mineral Resources Data System (MRDS) for this area, left out sand, gravel, crushed stone, clay pits and unnamed sites, grouped them by Census county, and linked every site to its USGS record. We did not visit these sites, and MRDS does not tell you who owns the land or whether collecting is allowed.
Source: USGS Mineral Resources Data System (MRDS). USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date. Each site links to its USGS record.
Updated