RockWoofSketch map
Woof’s favorite find
Green Mountain
We picked it because its USGS record mentions 2 gem or collectible minerals (Gold, Silver) and 3 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as prospect for Gold. Minerals mentioned: Gold, Copper, Silver. Approx. location 45.947, -122.724. 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.
Explored or test-dug, with no recorded production.
Produced ore or material at some point in the past.
Status not recorded.
A processing plant site.
Status terms come from USGS MRDS records.
Mineral cards
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. 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
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
1 site
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
1 site
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
1 site
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Cinnabar 1Bauxite 1Gibbsite 1Commodities
Aluminum 7Mercury 2Gold 1Gemstone 1Contained or Metal 1Iron 1Geothermal 1Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Washington Bauxite Dist. | Aluminum | Bauxite, Gibbsite | Occurrence | 46.200, -123.168 |
| Green River | Mercury | Cinnabar | Occurrence | 46.385, -122.587 |
| Mill Creek Area | Aluminum | — | Occurrence | 46.215, -123.190 |
| Ostrander Creek | — | — | Past Producer | 46.245, -122.810 |
| Green Mountain | Gold | — | Prospect | 45.947, -122.724 |
| Cowlitz Clay | — | — | Prospect | 46.352, -122.842 |
| Taylor Bros. | Aluminum | — | Unknown | 46.380, -122.751 |
| Silver Lake | Gemstone | — | Occurrence | 46.292, -122.711 |
| Cowlitz-Wahkiakum Area | Aluminum | — | Prospect | 46.227, -123.172 |
| (Facility) Longview Aluminum Smelter | Aluminum, Contained or Metal | — | Plant | 46.140, -122.998 |
| Ayers | Iron | — | Occurrence | 46.313, -122.986 |
| Soda Springs | Geothermal | — | Occurrence | 46.378, -122.266 |
| Longview | Aluminum | — | Occurrence | 46.184, -122.952 |
| Red Star | Mercury | — | Occurrence | 46.185, -122.615 |
| Section 4 | Aluminum | — | Occurrence | 46.212, -122.937 |
Fossil collections
The Paleobiology Database lists 2 fossil collection records in Cowlitz County. These are research records, not public dig sites.
Nearby counties
Wahkiakum County · Skamania County · Lewis County · Clark County · Thurston County
Washington mineral guides
- Tourmaline in Washington
- Quartz in Washington
- Garnet in Washington
- Gold in Washington
- Mica in Washington
- Feldspar in Washington
Back to all Washington 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