Independent Shaft, Somersville, Contra Costa County, California, USAi
| Regional Level Types | |
|---|---|
| Independent Shaft | Shaft |
| Somersville | Town (Historical) |
| Contra Costa County | County |
| California | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
37° 57' 31'' North , 121° 51' 48'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Clayton | 11,867 (2017) | 6.6km |
| Antioch | 110,542 (2017) | 7.2km |
| Pittsburg | 69,424 (2017) | 7.9km |
| Bay Point | 21,534 (2014) | 11.6km |
| North Gate | 679 (2017) | 13.2km |
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 |
|---|---|---|
| Antioch Lapidary Club | Antioch, California | 7km |
| Contra Costa Mineral & Gem Society | Concord, California | 15km |
| Northern California Geological Society | Orinda, California | 29km |
| Livermore Valley Lithophiles | Livermore, California | 32km |
| East Bay Mineral and Lapidary Club | Hayward, California | 37km |
Other/historical names associated with this locality:
Independent Mine
A 710-foot sealed shaft, which was the most northerly mine entry in the Mt. Diablo Coal Field. The shaft was sunk in 1865. By 1867, the company operating at the time failed. The shaft became inactive with the exception of being used to pump water from the nearby Eureka Mine. In 1873, the boiler attached to the bolts exploded and killed two men. Eventually, the Pittsburg Mining Company purchased the property, and the shaft returned to service around 1900. Soon after, the shaft was abandoned due to high production costs, better coal up in Washington, and the usage of oil as an industrial power source.
Some stones, bolts, and a depression in the ground are all that remain (as of December 2023). The site is directly next to the Black Diamond Mines Upper Parking Lot. It is within the boundaries of the Black Diamond Mines Regional Preserve.
May be related to https://www.mindat.org/loc-76651.html
List of minerals for each chemical element
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- California Coast RangesAccretionary Complex
- Franciscan DomainDomain
- Great Valley BasinBasin
- Sonoma-Livermore BasinBasin
USA
- California
- Diablo RangeMountain Range
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
Quick NavTopOther Regions
Independent Shaft, Somersville, Contra Costa County, California, USA