Sketch map
Woof’s favorite find
Arnold Hill Mines
We picked it because its USGS record mentions 1 gem or collectible mineral (Quartz) and 2 of our card minerals overall. That ties with 2 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 Iron. Minerals mentioned: Quartz, Magnetite. Approx. location 44.489, -73.617. 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?
Produced ore or material at some point in the past.
The mineral was noted here, without development.
Explored or test-dug, with no recorded production.
Status terms come from USGS MRDS records.
Mineral cards
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
3 sites
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
3 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
2 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
1 site
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
1 site
Fluorite
Mohs 4. Cubes in purple, green or yellow; many glow under UV. Mindat
1 site
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Chromite 1Magnetite 1Commodities
Iron 38Chromium 1Marble 1Dimension 1Aluminum 1Sites (first 40)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Plattsburg | Chromium | Chromite | Occurrence | 44.695, -73.447 |
| Arnold Hill Mines | Iron | Magnetite | Past Producer | 44.489, -73.617 |
| Averill Mine | Iron | — | Past Producer | 44.722, -73.726 |
| Burden Deposit | Iron | — | Past Producer | 44.717, -73.910 |
| Williams Mine | Iron | — | Past Producer | 44.729, -73.895 |
| Mitchell Prospect | Iron | — | Occurrence | 44.527, -73.652 |
| Dorothy Anomaly | Iron | — | Occurrence | 44.681, -73.787 |
| Tremblay Mine | Iron | — | Past Producer | 44.589, -73.883 |
| Finch Prospect | Iron | — | Past Producer | 44.481, -73.625 |
| Rutgers Deposit | Iron | — | Past Producer | 44.511, -73.668 |
| Cook Mine | Iron | — | Past Producer | 44.489, -73.584 |
| Mace Mine | Iron | — | Past Producer | 44.478, -73.575 |
| Ellis Mine | Iron | — | Past Producer | 44.749, -73.701 |
| Chalifou Prospect | Iron | — | Occurrence | 44.474, -73.616 |
| Unnamed Mine | Iron | — | Past Producer | 44.650, -73.798 |
| Lo Mar Mine | Iron | — | Past Producer | 44.738, -73.711 |
| Unnamed Quarry | Marble, Dimension | — | Past Producer | 44.453, -73.855 |
| Indian Deposit | Iron | — | Past Producer | 44.483, -73.541 |
| Lynch Prospect | Iron | — | Occurrence | 44.553, -73.660 |
| Phillips Vein | Iron | — | Past Producer | 44.716, -73.913 |
| 81 Mine | Iron | — | Past Producer | 44.704, -73.943 |
| Winter Mine | Iron | — | Occurrence | 44.451, -73.576 |
| Russia Station Mine | Iron | — | Past Producer | 44.674, -73.781 |
| Battie Mine | Iron | — | Past Producer | 44.504, -73.584 |
| Palmer Hill Mine | Iron | — | Past Producer | 44.465, -73.675 |
| Nelson Bush Mine | Iron | — | Past Producer | 44.489, -73.616 |
| Tremblay Pits | Iron | — | Occurrence | 44.593, -73.811 |
| Hogback Deposit | Iron | — | Past Producer | 44.517, -73.665 |
| Black Brook Propect | Iron | — | Occurrence | 44.458, -73.737 |
| Clayburg Mine | Iron | — | Past Producer | 44.591, -73.838 |
| Parkhurst Mine | Iron | — | Past Producer | 44.754, -73.870 |
| Dills and La Oake Mine | Iron | — | Past Producer | 44.511, -73.667 |
| Bowen and Signor Mine | Iron | — | Past Producer | 44.594, -73.808 |
| Jackson Mine | Iron | — | Past Producer | 44.486, -73.486 |
| Tremblay Mine | — | — | Past Producer | 44.589, -73.883 |
| Helen Ore Body Deposit | Iron | — | Occurrence | 44.545, -73.651 |
| Henry Mitchell Mine | — | — | Past Producer | 44.526, -73.652 |
| Arnold Hill Group | — | — | Past Producer | 44.488, -73.618 |
| Lynch Prospect | — | — | Prospect | 44.547, -73.661 |
| Phillips Vein | — | — | Past Producer | 44.716, -73.913 |
Fossil collections
The Paleobiology Database lists 103 fossil collection records in Clinton County. These are research records, not public dig sites.
Nearby counties
Franklin County · Essex County · Warren County · Hamilton County · Washington County
New York mineral guides
- Quartz in New York
- Garnet in New York
- Mica in New York
- Feldspar in New York
- Magnetite in New York
- Pyrite in New York
Back to all New York 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