Main Mine & mill, Port Costa, Contra Costa County, California, USAi
| Regional Level Types | |
|---|---|
| Main Mine & mill | - not defined - |
| Port Costa | - not defined - |
| Contra Costa County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 2' 34'' North , 122° 11' 8'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Port Costa | 190 (2011) | 0.5km |
| Benicia | 28,167 (2017) | 2.5km |
| Crockett | 3,094 (2011) | 2.6km |
| Martinez | 38,137 (2017) | 5.2km |
| Mountain View | 2,372 (2011) | 7.1km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Vallejo Gem & Mineral Society | Vallejo, California | 9km |
| Contra Costa Mineral & Gem Society | Concord, California | 15km |
| Northern California Geological Society | Orinda, California | 18km |
| Antioch Lapidary Club | Antioch, California | 34km |
| San Francisco Gem and Mineral Society, Inc. | San Francisco, California | 36km |
A crushed stone deposit/quarry/pit located in the SW¼ sec. 3, T2N, R3W, MDM, 0.5 km (0.3 mile; 1,700 feet) SW of Port Costa, about 3 miles N of state highway 4. MRDS database stated accuracy for this location is 10,000 meters.
Local rocks include Upper Cretaceous marine rocks, unit 1 (Upper Great Valley Sequence).
Workings include unspecified surface openings.
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.List of minerals for each chemical element
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- California Coast RangesAccretionary Complex
- Franciscan DomainDomain
- Sonoma-Livermore BasinBasin
USA
- California
- Diablo RangeMountain Range
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