RockWoofSketch map
Woof’s favorite find
Portland Tunnel
We picked it because its USGS record mentions 1 gem or collectible mineral (Agate) and 1 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as occurrence for Mercury. Minerals mentioned: Agate. Approx. location 45.539, -122.734. 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.
Was producing when the record was made.
Explored or test-dug, with no recorded production.
A processing plant site.
Status terms come from USGS MRDS records.
Mineral cards
Agate
Mohs 6.5–7. Banded, translucent chalcedony. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Bauxite 2Commodities
Aluminum 5Mercury 2Iron 2Geothermal 2Calcium 1Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Skyline Blvd Bauxite | Aluminum, Iron | Bauxite | Occurrence | 45.649, -122.905 |
| Bonser Prospect | Aluminum, Iron | Bauxite | Occurrence | 45.714, -122.873 |
| Portland Tunnel | Mercury | — | Occurrence | 45.539, -122.734 |
| Portland Tunnel | Mercury | — | Prospect | 45.539, -122.734 |
| Corbett | Geothermal | — | Producer | 45.541, -122.294 |
| Camp Collins Ymca | Geothermal | — | Producer | 45.502, -122.306 |
| (Facility) Troutdale Smelter | Aluminum | — | Plant | 45.558, -122.401 |
| Ash Grove Cement Plant | Calcium | — | Producer | 45.616, -122.784 |
| Skyline Blvd Bauxite Deposit | Aluminum | — | Occurrence | 45.649, -122.904 |
| Bonser Prospect | Aluminum | — | Occurrence | 45.714, -122.873 |
Nearby counties
Washington County · Columbia County · Yamhill County · Clackamas County · Tillamook County
Oregon mineral guides
- Tourmaline in Oregon
- Quartz in Oregon
- Garnet in Oregon
- Gold in Oregon
- Agate in Oregon
- Magnetite in Oregon
Back to all Oregon 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