RockWoofSketch map
Woof’s favorite find
Acton Mine
We picked it because its USGS record mentions 2 gem or collectible minerals (Gold, Silver) and 2 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as past producer for Lead. Minerals mentioned: Gold, Silver. Approx. location 43.479, -70.906. 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.
Explored or test-dug, with no recorded production.
The mineral was noted here, without development.
Status not recorded.
Was producing when the record was made.
Status terms come from USGS MRDS records.
Mineral cards
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
17 sites
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
6 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
2 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
2 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
2 sites
Gold
Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat
1 site
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
1 site
Galena
Mohs 2.5–2.75. Heavy, silvery lead ore that breaks into cubes. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Granite 2Galena 1Sphalerite 1Powellite 1Molybdenite 1Commodities
Granite 21Silver 13Lead 9Tungsten 8Molybdenum 5Gemstone 5Iron 3Zinc 2Tin 2Garnet 2Sites (first 40)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Hans Bergendahl Prospect | Copper, Molybdenum | Galena, Sphalerite, Powellite, Molybdenite | Occurrence | 43.649, -70.869 |
| John Swenson Granite Co | Granite | Granite | Past Producer | 43.338, -70.645 |
| John Swenson Granite Co | Granite | Granite | Past Producer | 43.253, -70.609 |
| Acton Area Mines | Zinc, Lead, Silver | — | Past Producer | 43.463, -70.894 |
| Northern Acton Mines | Lead | — | Past Producer | 43.497, -70.923 |
| Old Silver Mine (Davis Mine) | Lead | — | Past Producer | 43.612, -70.926 |
| Piper Hill (Bergensdahl Prospect) | Tin, Molybdenum | — | Past Producer | 43.653, -70.864 |
| Webster Scheelite Mine | Tungsten, Molybdenum | — | Past Producer | 43.428, -70.752 |
| Randall Mt. Mine (Parsonfield Area) | Lead | — | Past Producer | 43.712, -70.881 |
| Wiggin Mountain Occurrence | Tungsten | — | Occurrence | 43.690, -70.945 |
| Andrews & Perkins Quarries | Granite | — | Past Producer | 43.465, -70.419 |
| Bullion Mine | Silver | — | Past Producer | 43.474, -70.903 |
| Port Land Action Mine | — | — | Unknown | 43.480, -70.908 |
| Deering Acton Mine | Silver | — | Past Producer | 43.496, -70.916 |
| Porter Mine | Lead, Tungsten | — | Past Producer | 43.810, -70.979 |
| York Stone Company Quarry | Granite | — | Producer | 43.253, -70.609 |
| Boston Acton Mine | — | — | Past Producer | 43.558, -70.899 |
| Morris Prospect | Silver | — | Prospect | 43.470, -70.899 |
| Straw Hill Occurrence | Iron | — | Occurrence | 43.662, -70.852 |
| Marcille and Wormwood Quarry | Granite | — | Past Producer | 43.469, -70.465 |
| Dirigo Silver Mine | Lead | — | Past Producer | 43.488, -70.914 |
| Berry Prospect | Tungsten | — | Prospect | 43.750, -70.812 |
| Goodwin Quarry | Granite | — | Past Producer | 43.462, -70.409 |
| Spence and Coombs Black Granite Qy | Granite | — | Past Producer | 43.289, -70.710 |
| Vesuvianite Occurrence | Gemstone | — | Occurrence | 43.759, -70.914 |
| York County Mine | Silver | — | Past Producer | 43.464, -70.894 |
| Swenson Green Granite Quarry | Granite | — | Past Producer | 43.211, -70.599 |
| Androscoggin Acton-Mine | Silver | — | Past Producer | 43.490, -70.915 |
| Hatch Quarry | Granite | — | Past Producer | 43.306, -70.695 |
| Lord Prospect | Granite | — | Prospect | 43.361, -70.611 |
| Bear Hill Quarry | Granite | — | Past Producer | 43.596, -70.612 |
| Casco Acton Mine | Silver | — | Past Producer | 43.494, -70.915 |
| Swenson Pink Granite Quarry | Granite | — | Past Producer | 43.343, -70.681 |
| Acton Mine | Lead | — | Past Producer | 43.479, -70.906 |
| Ross Quarry | Granite | — | Past Producer | 43.451, -70.517 |
| Pease Mountain Prospect | Tungsten | — | Occurrence | 43.760, -70.804 |
| Caton Prospect | Feldspar | — | Prospect | 43.506, -70.715 |
| Scapolite Occurrence | Gemstone | — | Occurrence | 43.706, -70.911 |
| Galena Mine | Lead, Silver | — | Past Producer | 43.798, -70.873 |
| Bond Mountain Prospect | Iron | — | Prospect | 43.632, -70.906 |
Fossil collections
The Paleobiology Database lists 7 fossil collection records in York County. These are research records, not public dig sites.
Nearby counties
Cumberland County · Androscoggin County · Oxford County · Sagadahoc County · Kennebec County
Maine mineral guides
Back to all Maine 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