RockWoof
Check access before you go. Most sites listed here are old mines, quarries or prospects, and many are on private land or active mining claims. Get the landowner's permission, check the rules of the agency that manages any public land, and never enter mine workings. Locations are approximate.

Sketch map

Black Buttes + 1 more nearby (Occurrence)B.S. No. 1 + 1 more nearby (Prospect)Grey Eagle Mine (Past Producer)Nye (Occurrence)Elephant Hill + 1 more nearby (Occurrence)K. B. No. 4 (Producer)Conklin and Williams (Occurrence)Hummingbird (Occurrence)Hummingbird (Prospect)Elephant Hi31 (Producer)Black Diamond Mine (Past Producer)Black Diamond Mine + 4 more nearby (Past Producer)High Point Mine + 1 more nearby (Occurrence)Luce Claims + 1 more nearby (Occurrence)Titanic + 1 more nearby (Occurrence)Valley View + 6 more nearby (Occurrence)Elephant Hill Prospect + 1 more nearby (Unknown)Brown and Moore + 8 more nearby (Producer)St. John + 5 more nearby (Occurrence)Big Stoney Creek Mine (Prospect)Unnamed Location (Occurrence)Levensaler and Speir Prospect (Past Producer)Swastika + 8 more nearby (Occurrence)Levensaler and Spier + 1 more nearby (Producer)Daniels (Occurrence)Nye Ranch (Occurrence)Avery Claims (Occurrence)Talbot (Occurrence)Unnamed Location (Unknown)Hamilton City Plant (Producer)
Past ProducerProducerProspectOccurrenceStatus unknown
30 paw pins; nearby sites are grouped into one pin. Hover or tap a pin for the site name. County outline: US Census Bureau cartographic boundary file (2023). Locations approximate.

Woof’s favorite find

Titanic

We picked it because its USGS record mentions 1 gem or collectible mineral (Gold) and 1 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 occurrence for Gold. Minerals mentioned: Gold. Approx. location 39.658, -122.596. 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?

25
Occurrence

The mineral was noted here, without development.

18
Prospect

Explored or test-dug, with no recorded production.

12
Producer

Was producing when the record was made.

7
Past Producer

Produced ore or material at some point in the past.

7
Unknown

Status not recorded.

Status terms come from USGS MRDS records.

Mineral cards

Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.

Minerals recorded here

Chromite 8Psilomelane 5Pyrolusite 5Cinnabar 2Cuprite 1Uvarovite 1

Commodities

Chromium 19Manganese 10Copper 7Marble 4Dimension 4Gold 3Mercury 2Granite 1Geothermal 1Calcium 1

Sites (first 40)

SiteCommodityMinerals recordedStatusApprox. location
Avery ClaimsChromiumChromiteOccurrence39.597, -122.384
SwastikaChromiumChromiteOccurrence39.443, -122.552
High Point MineChromiumChromiteOccurrence39.726, -122.581
Luce ClaimsChromiumChromiteOccurrence39.686, -122.602
Conklin and WilliamsChromiumChromiteOccurrence39.796, -122.631
Black Diamond MineChromiumChromitePast Producer39.738, -122.603
Chrome KingChromiumChromiteProducer39.490, -122.572
Grey Eagle MineChromiumChromite, UvarovitePast Producer39.738, -122.603
Turner RanchMercuryCinnabarOccurrence39.600, -122.529
Nye RanchMercuryCinnabarOccurrence39.587, -122.447
Black Buttes—CupriteOccurrence39.729, -122.809
RattlesnakeManganesePsilomelane, PyrolusiteProducer39.438, -122.568
Brown and MooreManganesePsilomelane, PyrolusiteProducer39.446, -122.590
Hummingbird—Psilomelane, PyrolusiteOccurrence39.637, -122.611
B.S. No. 1—Psilomelane, PyrolusiteProspect39.644, -122.733
K. B. No. 4ManganesePsilomelane, PyrolusiteProducer39.446, -122.590
BrownMarble, Dimension—Occurrence39.435, -122.546
DanielsMarble, Dimension—Occurrence39.402, -122.529
Valley View——Occurrence39.500, -122.574
Levensaler and SpierManganese—Producer39.581, -122.531
Brisco——Occurrence39.517, -122.606
Elephant HillManganese—Occurrence39.483, -122.650
Knight——Occurrence39.496, -122.577
Grey Eagle MineChromium—Producer39.738, -122.603
SvastikaChromium—Producer39.444, -122.543
LabornCopper—Prospect39.443, -122.575
Elephant Hi31Manganese—Producer39.484, -122.647
TalbotGranite—Occurrence39.434, -122.341
Lehour——Occurrence39.443, -122.571
St. John——Occurrence39.416, -122.571
Unnamed Prospect——Occurrence39.418, -122.589
TitanicGold—Occurrence39.658, -122.596
NyeMarble, Dimension—Occurrence39.428, -122.712
K. B. No. 1——Prospect39.455, -122.609
Black Diamond North StarManganese—Producer39.407, -122.609
Grey Eagle Mine-Black DiamondChromium—Producer39.733, -122.584
K. B. No. 4Manganese—Producer39.434, -122.684
Rattlesnake Mine——Past Producer39.438, -122.566
Black DiamondChromium—Prospect39.740, -122.605
Unnamed LocationGold—Unknown39.766, -122.147

Fossil collections

The Paleobiology Database lists 51 fossil collection records in Glenn County. These are research records, not public dig sites.

Nearby counties

Colusa County · Mendocino County · Lake County · Sutter County · Yolo County

California mineral guides

Back to all California counties.

Related articles

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