RockWoofSketch map
Woof’s favorite find
Washington-Multnomah Area
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 1 other site(s), so we broke the tie by mine status (past producers first), then USGS record quality, then name. USGS lists it as prospect for Aluminum. Minerals mentioned: Magnetite. Approx. location 45.686, -122.988. 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.
Status terms come from USGS MRDS records.
Mineral cards
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
2 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Limonite 2Gibbsite 1Commodities
Aluminum 9Iron 4Titanium 4Metal 4Platinum 1PGE 1Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Bauxite Pumpkin Ridge | Aluminum, Iron | Gibbsite, Limonite | Occurrence | 45.678, -123.050 |
| Bauxite Dixie Mt | Aluminum, Iron, Titanium, Metal | Limonite | Occurrence | 45.681, -122.982 |
| Bauxite Tualatin Mountains | Aluminum, Iron, Titanium, Metal | — | Occurrence | 45.611, -122.902 |
| Bauxite Red Flat Hill | Aluminum, Iron, Titanium, Metal | — | Occurrence | 45.710, -123.075 |
| Hillsboro | Platinum | — | Occurrence | 45.500, -122.991 |
| Tualatin Mountains Bauxite | Aluminum | — | Prospect | 45.611, -122.902 |
| Hillsboro Platinum Occurrence | PGE | — | Occurrence | 45.524, -122.988 |
| Dixie Mountain Bauxite | Aluminum | — | Occurrence | 45.688, -122.987 |
| Pumpkin Ridge Bauxite | Aluminum | — | Occurrence | 45.678, -123.050 |
| Washington-Multnomah Area | Aluminum | — | Prospect | 45.686, -122.988 |
| Red Flat Hill Bauxite | Aluminum | — | Prospect | 45.710, -123.075 |
Fossil collections
The Paleobiology Database lists 19 fossil collection records in Washington County. These are research records, not public dig sites.
Nearby counties
Multnomah County · Columbia County · Yamhill County · Tillamook County · Clackamas 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