West Belt, Mariposa County, California, USAi
| Regional Level Types | |
|---|---|
| West Belt | - not defined - |
| Mariposa County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 25' North , 120° 15' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Catheys Valley | 825 (2011) | 13.5km |
| Planada | 4,584 (2011) | 15.2km |
| Tuttle | 103 (2011) | 17.6km |
| Bear Creek | 290 (2011) | 19.9km |
| Snelling | 231 (2011) | 20.1km |
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 |
|---|---|---|
| Mariposa Gem & Mineral Club | Mariposa, California | 26km |
Commodities (Major) - Gold
Development Status: Producer
Development Status: Producer
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localities47 valid minerals.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| ⓘ | Native Silver ? | 1.AA.05 | Ag |
| ⓘ | Native Osmium | 1.AF.05 | (Os,Ir,Ru) |
| ⓘ | Native Ruthenium | 1.AF.05 | (Ru,Ir) |
| ⓘ | Native Iridium | 1.AF.10 | (Ir,Os,Ru) |
| ⓘ | Native Platinum | 1.AF.10 | Pt |
| ⓘ | Isoferroplatinum | 1.AG.35 | Pt3Fe |
| ⓘ | Tetraferroplatinum | 1.AG.40 | PtFe |
| ⓘ | Native Sulphur | 1.CC.05 | S8 |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcocite | 2.BA.05 | Cu2S |
| ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
| ⓘ | Acanthite | 2.BA.35 | Ag2S |
| ⓘ | Covellite | 2.CA.05a | CuS |
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Cooperite | 2.CC.35b | PtS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Cinnabar | 2.CD.15a | HgS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Marcasite | 2.EB.10a | FeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| ⓘ | Proustite | 2.GA.05 | Ag3AsS3 |
| ⓘ | Pyrargyrite | 2.GA.05 | Ag3SbS3 |
| ⓘ | 'Tetrahedrite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)Sb4S12S |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Goethite | 4.00. | Fe3+O(OH) |
| ⓘ | Cuprite | 4.AA.10 | Cu2O |
| ⓘ | Tenorite | 4.AB.10 | CuO |
| ⓘ | Hausmannite | 4.BB.10 | Mn2+Mn3+2O4 |
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | var. Milky Quartz | 4.DA.05 | SiO2 |
| ⓘ | Pyrolusite | 4.DB.05 | Mn4+O2 |
| ⓘ | Todorokite | 4.DK.10 | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | var. Manganese-bearing Calcite | 5.AB.05 | (Ca,Mn)CO3 |
| ⓘ | Ankerite | 5.AB.10 | Ca(Fe2+,Mg)(CO3)2 |
| ⓘ | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Baryte | 7.AD.35 | BaSO4 |
| ⓘ | Alunite | 7.BC.10 | KAl3(SO4)2(OH)6 |
| Group 9 - Silicates | |||
| ⓘ | Tephroite | 9.AC.05 | Mn2+2(SiO4) |
| ⓘ | Andalusite | 9.AF.10 | Al2(SiO4)O |
| ⓘ | Piemontite | 9.BG.05a | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| ⓘ | Rhodonite | 9.DK.05 | CaMn3Mn[Si5O15] |
| ⓘ | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
| ⓘ | Pyrophyllite | 9.EC.10 | Al2Si4O10(OH)2 |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | Kaolinite | 9.ED.05 | Al2(Si2O5)(OH)4 |
| ⓘ | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| ⓘ | Bementite | 9.EE.05 | Mn7Si6O15(OH)8 |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Clay minerals' | - | |
| ⓘ | 'Limonite' | - | |
| ⓘ | 'Psilomelane' | - | |
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Alunite | KAl3(SO4)2(OH)6 |
| H | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| H | ⓘ Bementite | Mn7Si6O15(OH)8 |
| H | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | ⓘ Goethite | Fe3+O(OH) |
| H | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Pyrophyllite | Al2Si4O10(OH)2 |
| H | ⓘ Talc | Mg3Si4O10(OH)2 |
| H | ⓘ Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
| H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| C | Carbon | |
| C | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| C | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Alunite | KAl3(SO4)2(OH)6 |
| O | ⓘ Andalusite | Al2(SiO4)O |
| O | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| O | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| O | ⓘ Baryte | BaSO4 |
| O | ⓘ Bementite | Mn7Si6O15(OH)8 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | ⓘ Cuprite | Cu2O |
| O | ⓘ Goethite | Fe3+O(OH) |
| O | ⓘ Hausmannite | Mn2+Mn23+O4 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| O | ⓘ Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Pyrolusite | Mn4+O2 |
| O | ⓘ Pyrophyllite | Al2Si4O10(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| O | ⓘ Talc | Mg3Si4O10(OH)2 |
| O | ⓘ Tenorite | CuO |
| O | ⓘ Tephroite | Mn22+(SiO4) |
| O | ⓘ Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
| O | ⓘ Quartz var. Milky Quartz | SiO2 |
| O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Na | Sodium | |
| Na | ⓘ Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
| Mg | Magnesium | |
| Mg | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Mg | ⓘ Talc | Mg3Si4O10(OH)2 |
| Mg | ⓘ Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
| Al | Aluminium | |
| Al | ⓘ Alunite | KAl3(SO4)2(OH)6 |
| Al | ⓘ Andalusite | Al2(SiO4)O |
| Al | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Al | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Pyrophyllite | Al2Si4O10(OH)2 |
| Al | ⓘ Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
| Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Andalusite | Al2(SiO4)O |
| Si | ⓘ Bementite | Mn7Si6O15(OH)8 |
| Si | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Pyrophyllite | Al2Si4O10(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Si | ⓘ Talc | Mg3Si4O10(OH)2 |
| Si | ⓘ Tephroite | Mn22+(SiO4) |
| Si | ⓘ Quartz var. Milky Quartz | SiO2 |
| Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| S | Sulfur | |
| S | ⓘ Acanthite | Ag2S |
| S | ⓘ Alunite | KAl3(SO4)2(OH)6 |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Baryte | BaSO4 |
| S | ⓘ Bornite | Cu5FeS4 |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Chalcocite | Cu2S |
| S | ⓘ Cinnabar | HgS |
| S | ⓘ Cooperite | PtS |
| S | ⓘ Covellite | CuS |
| S | ⓘ Galena | PbS |
| S | ⓘ Marcasite | FeS2 |
| S | ⓘ Proustite | Ag3AsS3 |
| S | ⓘ Pyrargyrite | Ag3SbS3 |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| S | ⓘ Native Sulphur | S8 |
| S | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| K | Potassium | |
| K | ⓘ Alunite | KAl3(SO4)2(OH)6 |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
| K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
| Ca | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Ca | ⓘ Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
| Mn | Manganese | |
| Mn | ⓘ Bementite | Mn7Si6O15(OH)8 |
| Mn | ⓘ Hausmannite | Mn2+Mn23+O4 |
| Mn | ⓘ Calcite var. Manganese-bearing Calcite | (Ca,Mn)CO3 |
| Mn | ⓘ Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
| Mn | ⓘ Pyrolusite | Mn4+O2 |
| Mn | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Mn | ⓘ Tephroite | Mn22+(SiO4) |
| Mn | ⓘ Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
| Fe | Iron | |
| Fe | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Bornite | Cu5FeS4 |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Goethite | Fe3+O(OH) |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Isoferroplatinum | Pt3Fe |
| Fe | ⓘ Marcasite | FeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Tetraferroplatinum | PtFe |
| Cu | Copper | |
| Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| Cu | ⓘ Bornite | Cu5FeS4 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Chalcocite | Cu2S |
| Cu | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | ⓘ Covellite | CuS |
| Cu | ⓘ Cuprite | Cu2O |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | ⓘ Tenorite | CuO |
| Cu | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| As | ⓘ Proustite | Ag3AsS3 |
| Sr | Strontium | |
| Sr | ⓘ Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
| Ru | Ruthenium | |
| Ru | ⓘ Native Iridium | (Ir,Os,Ru) |
| Ru | ⓘ Native Osmium | (Os,Ir,Ru) |
| Ru | ⓘ Native Ruthenium | (Ru,Ir) |
| Ag | Silver | |
| Ag | ⓘ Acanthite | Ag2S |
| Ag | ⓘ Proustite | Ag3AsS3 |
| Ag | ⓘ Pyrargyrite | Ag3SbS3 |
| Ag | ⓘ Native Silver | Ag |
| Sb | Antimony | |
| Sb | ⓘ Pyrargyrite | Ag3SbS3 |
| Sb | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Ba | Barium | |
| Ba | ⓘ Baryte | BaSO4 |
| Ba | ⓘ Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
| Os | Osmium | |
| Os | ⓘ Native Iridium | (Ir,Os,Ru) |
| Os | ⓘ Native Osmium | (Os,Ir,Ru) |
| Ir | Iridium | |
| Ir | ⓘ Native Iridium | (Ir,Os,Ru) |
| Ir | ⓘ Native Osmium | (Os,Ir,Ru) |
| Ir | ⓘ Native Ruthenium | (Ru,Ir) |
| Pt | Platinum | |
| Pt | ⓘ Cooperite | PtS |
| Pt | ⓘ Isoferroplatinum | Pt3Fe |
| Pt | ⓘ Native Platinum | Pt |
| Pt | ⓘ Tetraferroplatinum | PtFe |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Localities in this Region
- California
- Mariposa County
- West Belt
- Burns Creek
- Cathey Mining District (Cathay Mining District)
- Catheys Valley
- Cow and Calf Mountain
- Garnet Point
- Round Hills
- A. C. Smith Mine
- Brushy Canyon deposits
- Cornett Mine
- Francis Mine (Frances Mine)
- Givens prospect
- Great Northern Mine
- Hanas placer ground (Nanas placer ground)
- Helm Ranch
- Miles Creek deposits
- Red Flag Placer Mine
- Unnamed Au occurrence [20]
- Unnamed Au placer properties [3]
- Unnamed placer Au property [57]
- Wildcat Mountain
- Granite Springs Mining District
- Hayward
- Hornitos Mining District
- Hornitos
- Anderson occurrence [1]
- Barker Corporation dredge grounds
- Calderon Mine
- Crocker - Huffman Land and Water Company property
- D. M. Poole Mine
- Domingas occurrence
- Duncan Mine (Lost Douglas Mine)
- Gardosa prospect
- Gonzales Mine (Houghton and Gonzales Mine)
- Josie claims (Key Lode; Key Lode Extension)
- Lucky Quartz Mine
- Miller's Ranch
- Spangler Mine
- Unidentified Au mine [12]
- Unnamed Au property [42]
- Unnamed Au property [51]
- Unnamed Au prospect [17]
- Unnamed Au prospect [59]
- Unnamed Pyrite-Quartz occurrence [1]
- Washington Mine (Red Cloud Mine; Johnny Lind Mine; Jenny Lind Mine)
- Quartz Mountain [2]
- Quartzburg
- Hornitos
- West Belt
- Mariposa County
- California
- Mariposa County
- West Belt
- Hornitos Mining District
- Quartzburg
- Ginaco 1 and 2 claims
- Guest Mine
- Independence claims (Starlight)
- Jessie Mine (Kay lode; Kay lode extension)
- Mount Gaines Mine (Frenchman Mine; Bearfield Mine; Barfield Mine; Mount Gaines Gold Mine)
- Number Eight Mine
- Number Five Mine (Monte Carlo Mine; Number 5 claim; Jack Quartz claim; Standby fractional claim; No. 5 Extension claim)
- Number Nine Mine (Yosemite Ginaca Mine; Bill Jones and McCall Mine)
- Number One Mine (Martin Quartz Mine)
- Organeta Mine
- Poole Mine (Poole Track)
- Porcupine Placer Mine
- Quartzburg School
- Silver Lead Mine (St. Gabriel and Honeycomb Mine; Silver Lead & Margaretta Mine; Silver Lead claim; Margaretta claim; St. Gabriel claim; Honeycomb claim)
- St. Gabriel Mine
- Sunset I group (Trujillo; Sunset claim; South Sunset Extension claim; La Venue & Nacimiento del Oro claim)
- Unnamed Au placer [16]
- Unnamed Au property [55]
- Unnamed Au prospect [15]
- Yellow Jacket claim
- Santa Cruz Mountain
- Three Buttes (Tres Cerritos)
- Pacific Slate Company Quarry
- Pyrophyllite occurrence near Indian Gulch
- Silver Bar Nos. 2; 3; 4 prospect
- Unknown stone deposit [2]
- Unnamed Alunite occurrence [1]
- Unnamed Andalusite occurrence [1]
- Unnamed Au occurrence [18]
- Unnamed placer Au mine [45]
- Unnamed placer Au property [48]
- Unnamed Serpentine occurrence [1]
- Waltz property [1]
- Waltz property [2]
- Quartzburg
- Hunter Valley Mining District
- Hunter Valley
- Hunter Valley Mountain
- Williams Peak
- A. J. Burkhart Mine
- Bright Hope Mine
- Costa placer
- Cotton Creek Mine
- Dominques occurrence
- Evening Star Mine
- Ganara occurrence
- Geneva Mine
- Gold Run occurrence
- Horseshoe II Mine
- Juniper Mine
- La Victoria Mine
- Lucky Mine
- Meriposa occurrence
- Morning Star Mine
- Nevada Mine
- Olney Extension Mine
- Orange Blossom Mine
- Pine Cone occurrence
- Pyramid Mine
- Robin Mine
- Schoolhouse Mine
- Sunset Mine
- Unidentified Au prospect [13]
- Yellowstone Mine
- Webb Station
- Akoz Mine (Asposozien Mine; B.A.B. Mine; Radium Mine)
- Antler claim
- Cherokee I Mine
- Cotton Creek deposit
- Exchequer Mine
- Fitch Mine
- Jones Flat placer
- Prouty Ranch deposit
- Three Tree Mine
- Unidentified Au mine workings [7]
- Unnamed Au mine [40]
- Unnamed Au property [58]
- Unnamed Clay deposit [1]
- Unnamed Cr property [1]
- Hornitos Mining District
- West Belt
- Mariposa County
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Foothills-Wallowa DomainDomain
- Sierra Nevada BatholithVolcanic Arc
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Pyrophyllite occurrence near Indian Gulch, Three Buttes, Hornitos Mining District, West Belt, Mariposa County, California, USA