Ferroaxinite occurrence, Stinson Beach, Marin County, California, USAi
| Regional Level Types | |
|---|---|
| Ferroaxinite occurrence | Coast |
| Stinson Beach | Beach |
| Marin County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 53' 45'' North , 122° 38' 9'' West
Latitude & Longitude (decimal):
Type:
Coast - last checked 2020
Deposit first discovered:
1983 (approx.)
Köppen climate type:
Mindat Locality ID:
374477
Long-form identifier:
mindat:1:2:374477:5
GUID (UUID V4):
ed5ebadf-01e9-4f5d-8763-353fa7801f69
Other/historical names associated with this locality:
Ferroaxinite occurrence
“Small, euhdral ferroaxinite crystals are found with quartz in the hill 100 yards back of Stinson State beach park. The locality is just east of the intersection of Panoramic Highway with State Highway 1” (Pemberton,H.Earl 1983 pg. 506). Map is also on pg. 506
From parking lot just on the turn, cross country to big boulder “hill”. Thin veins of quartz with vugs of ferroaxinite, quartz crystals, and tremolite hair are found going through boulder. Ferroaxinite crystals range up to 5mm across longest dimension. Prehnite is also said to occur with ferroaxinite crystals. (pg. 489). Boulder and host rock is meta-basalt. Very shrub and plant infested, best specimens were found on top of boulder in broken up rock.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Axinite-(Fe) Formula: Ca2Fe2+Al2BSi4O15OH |
| ⓘ Prehnite Formula: Ca2Al2Si3O10(OH)2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Tremolite Formula: ◻Ca2Mg5(Si8O22)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Axinite-(Fe) | 9.BD.20 | Ca2Fe2+Al2BSi4O15OH |
| ⓘ | Tremolite | 9.DE.10 | ◻Ca2Mg5(Si8O22)(OH)2 |
| ⓘ | Prehnite | 9.DP.20 | Ca2Al2Si3O10(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
| H | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| H | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| B | Boron | |
| B | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
| O | Oxygen | |
| O | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
| O | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Mg | Magnesium | |
| Mg | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
| Al | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Si | Silicon | |
| Si | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
| Si | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
| Ca | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Ca | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Fe | Iron | |
| Fe | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Franciscan DomainDomain
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References
Ferroaxinite occurrence, Stinson Beach, Marin County, California, USA