Maillard Ranch occurrence [1], San Geronimo, Marin County, California, USAi
| Regional Level Types | |
|---|---|
| Maillard Ranch occurrence [1] | Occurrence |
| San Geronimo | - not defined - |
| Marin County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 0' 3'' North , 122° 38' 12'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Woodacre | 1,348 (2011) | 1.5km |
| San Geronimo | 446 (2011) | 2.7km |
| Fairfax | 7,626 (2017) | 4.5km |
| Sleepy Hollow | 2,384 (2011) | 4.7km |
| Lagunitas-Forest Knolls | 1,819 (2011) | 5.1km |
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 |
|---|---|---|
| San Francisco Gem and Mineral Society, Inc. | San Francisco, California | 32km |
| Vallejo Gem & Mineral Society | Vallejo, California | 35km |
| Northern California Geological Society | Orinda, California | 42km |
| Santa Rosa Mineral And Gem Society, Inc. | Santa Rosa, California | 49km |
Mindat Locality ID:
81881
Long-form identifier:
mindat:1:2:81881:9
GUID (UUID V4):
b6f2ec63-8460-44d5-ab6c-5bfe87020cc0
A Cr occurrence located in sec. 21, T2N, R7W, MDM, 2.7 km (1.7 miles; 8,900 feet) ESE of San Geronimo, ½ mile S of Woodacre and 8 miles NW of San Rafael. MRDS database stated accuracy for this location is 1,000 meters.
Mineralization is chromite float; chromite in situ was not found. Local rocks include rocks of the Franciscan melange.
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
1 valid mineral.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Other Databases
| Link to USGS MRDS: | 10284762 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Franciscan DomainDomain
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References
