Bunker Road tunnel (Unspecified road tunnel), Fort Barry, Marin County, California, USAi
| Regional Level Types | |
|---|---|
| Bunker Road tunnel (Unspecified road tunnel) | Tunnel |
| Fort Barry | - not defined - |
| Marin County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 50' 25'' North , 122° 29' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sausalito | 7,156 (2017) | 2.1km |
| Marin City | 2,666 (2011) | 3.5km |
| Belvedere | 2,121 (2018) | 4.2km |
| Tiburon | 9,214 (2018) | 4.7km |
| Tamalpais-Homestead Valley | 10,735 (2011) | 5.8km |
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 |
|---|---|---|
| San Francisco Gem and Mineral Society, Inc. | San Francisco, California | 10km |
| Northern California Geological Society | Orinda, California | 28km |
| Vallejo Gem & Mineral Society | Vallejo, California | 36km |
| Mineral & Gem Society of Castro Valley | Hayward, California | 41km |
| Contra Costa Mineral & Gem Society | Concord, California | 43km |
Mindat Locality ID:
211120
Long-form identifier:
mindat:1:2:211120:2
GUID (UUID V4):
d9695ec4-daf1-483f-aa01-ee0da8609449
A sulphate-gypsum occurrence located at a road tunnel near Fort Barry.
NOTE: The only tunnel that appears on the topo maps is the Bunker Road tunnel, connecting Fort Barry with Fort Baker on the other side of U.S. highway 101/state highway 1. The only other tunnel in the area, the U.S. highway 101 tunnel, in further N near the boundary of Sausalito, and off the old military area.
Mineralization is hosted in shale.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
2 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Alunogen Formula: Al2(SO4)3 · 17H2O Habit: Fibrous Description: Occurs as tufts with gypsum. |
| ⓘ Gypsum Formula: CaSO4 · 2H2O Description: Occurs with alunogen. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
|---|---|---|---|
| ⓘ | Alunogen | 7.CB.45 | Al2(SO4)3 · 17H2O |
| ⓘ | Gypsum | 7.CD.40 | CaSO4 · 2H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Alunogen | Al2(SO4)3 · 17H2O |
| H | ⓘ Gypsum | CaSO4 · 2H2O |
| O | Oxygen | |
| O | ⓘ Alunogen | Al2(SO4)3 · 17H2O |
| O | ⓘ Gypsum | CaSO4 · 2H2O |
| Al | Aluminium | |
| Al | ⓘ Alunogen | Al2(SO4)3 · 17H2O |
| S | Sulfur | |
| S | ⓘ Alunogen | Al2(SO4)3 · 17H2O |
| S | ⓘ Gypsum | CaSO4 · 2H2O |
| Ca | Calcium | |
| Ca | ⓘ Gypsum | CaSO4 · 2H2O |
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Franciscan DomainDomain
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References
