Tunnel Rock Quarry, Orinda, Contra Costa County, California, USAi
| Regional Level Types | |
|---|---|
| Tunnel Rock Quarry | Quarry |
| Orinda | - not defined - |
| Contra Costa County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 51' 19'' North , 122° 12' 2'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Orinda | 19,279 (2017) | 3.1km |
| Piedmont | 11,376 (2018) | 4.4km |
| Berkeley | 120,972 (2017) | 6.6km |
| Moraga | 17,256 (2017) | 6.6km |
| Emeryville | 11,694 (2017) | 7.9km |
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 |
|---|---|---|
| Northern California Geological Society | Orinda, California | 3km |
| Contra Costa Mineral & Gem Society | Concord, California | 20km |
| San Francisco Gem and Mineral Society, Inc. | San Francisco, California | 21km |
| East Bay Mineral and Lapidary Club | Hayward, California | 22km |
| Mineral & Gem Society of Castro Valley | Hayward, California | 23km |
A former stone (crushed/broken) deposit/quarry/pit located in the SW¼ sec. 9, T1S, R3W, MDM, 3.1 km (1.9 miles) SW of Orinda, in the Berkeley Hills, E of Berkeley and ¾ mile E of the Broadway Tunnel (Caldecott Tunnel - highway 24). Operated by A.C. Goerig. MRDS database stated accuracy for this location is 500 meters. Work started in 1951 on a contractual basis. Site was owner operated since 1952. Reported capacity in 1958 was to be 150 tons per day, producing rip-rap up to 10 ton individual stones, and crusher-run base and drain rock.
Local rocks include Miocene marine rocks and/or Plio-Pleistocene and Pliocene loosely consolidated deposits.
Workings include surface openings comprised of a quarry 150 feet long by 100 feet wide by 12 feet high.
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.List of minerals for each chemical element
Other Databases
| Link to USGS MRDS: | 10029585 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- California Coast RangesAccretionary Complex
- Franciscan DomainDomain
- Sonoma-Livermore BasinBasin
USA
- California
- Diablo RangeMountain Range
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