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Unnamed Piemontite occurrence [1] (San Gorgonio Pass), Whitewater (White Water), Riverside Co., California, USAi
Regional Level Types
Unnamed Piemontite occurrence [1] (San Gorgonio Pass)Occurrence
Whitewater (White Water)- not defined -
Riverside Co.County
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
33° 59' 25'' North , 116° 39' 55'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Morongo Valley3,552 (2011)10.0km
Cabazon2,535 (2011)13.8km
Garnet7,543 (2011)14.8km
Desert Hot Springs28,335 (2017)15.2km
Banning30,945 (2017)20.7km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Shadow Mountain Gem & Mineral SocietyPalm Springs, California21km
First Class MinersYucca Valley, California25km
Hi-Desert Rockhounds of Morongo ValleyYucca Valley, California25km
Yucaipa Valley Gem & Mineral SocietyYucaipa, California35km
Mindat Locality ID:
191144
Long-form identifier:
mindat:1:2:191144:5
GUID (UUID V4):
e92678a2-0272-45e6-94dc-19308ed76ea8


An occurrence located in sec. 22, T2S, R3E, SBM, 7.7 km (4.8 miles) NNW of Whitewater (town), along the W canyon wall of the Whitewater River, W of the Whitewater Trout farm.

Piemontite-bearing gneiss, forming part of a pre-Cretaceous metamorphic complex which crops out in the southern foothills of the San Bernardino Mountains. Along the Banning fault, which trends E-W along the north side of San Gorgonio pass, this complex is thrust over Pliocene and Pleistocene sedimentary and volcanic rocks. The gneisses crop out in the area North of this fault.

While the article cited below vaguely refers to the locality as San Gorgonio pass, the article deals with two specific outcrops. The one described here is located on the west side of the Whitewater River. The other outcrop is located further West within the Morongo Indian Reservation, about 0.6 miles West of Stubby Canyon. Boulders of piemontite-bearing gneiss also occur in Pliocene conglomerate in the Painted Hills, east of the Whitewater river.

The piemontite gneiss and associated epidote gneiss are light-colored rocks which form a layered zone within the metamorphic complex. The typical rock in the surrounding area is a dark-colored hornblende-biotite gneiss. About 75-80% of the piemontite gneiss consists of quartz, plagioclase and microcline; the remainder consists of piemontite, mica, amphibole, pyroxene, garnet and hematite in varied proportions. Bright red piemontite-rich layers and pods are prominent features. Pegmatitic lenses, layers and dykes are common, but usually only some inches long. They contain all the minerals of the gneisses and also up to 25% of ilmenite.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


15 valid minerals.

Detailed Mineral List:

β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ Calcite
Formula: CaCO3
Reference: David Singer: Highly oxidized rocks from the San Gorgonio Pass, California; Petrologic and thermodynamic calculations. (Senior honors thesis, Department of Geological Sciences, University of Michigan; advisors: Eric Essene and Casey Donohue).
β“˜ Diopside
Formula: CaMgSi2O6
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Description: Mn-bearing.
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ Hematite
Formula: Fe2O3
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ Hollandite
Formula: Ba(Mn4+6Mn3+2)O16
Description: with over 2.0% W.
Reference: David Singer: Highly oxidized rocks from the San Gorgonio Pass, California; Petrologic and thermodynamic calculations. (Senior honors thesis, Department of Geological Sciences, University of Michigan; advisors: Eric Essene and Casey Donohue).
β“˜ Hydroxylapatite
Formula: Ca5(PO4)3(OH)
Description: with up to 8 wt% As, forming a series towards johnbaumite.
Reference: David Singer: Highly oxidized rocks from the San Gorgonio Pass, California; Petrologic and thermodynamic calculations. (Senior honors thesis, Department of Geological Sciences, University of Michigan; advisors: Eric Essene and Casey Donohue).
β“˜ Ilmenite
Formula: Fe2+TiO3
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ Microcline
Formula: K(AlSi3O8)
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ Piemontite
Formula: (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ Quartz
Formula: SiO2
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ Rutile
Formula: TiO2
Reference: David Singer: Highly oxidized rocks from the San Gorgonio Pass, California; Petrologic and thermodynamic calculations. (Senior honors thesis, Department of Geological Sciences, University of Michigan; advisors: Eric Essene and Casey Donohue).
β“˜ Spessartine
Formula: Mn2+3Al2(SiO4)3
Reference: Smith, D., and Albee, A.L. (1967): Contributions to Mineralogy and Petrology 16, 189-203.
β“˜ Titanite
Formula: CaTi(SiO4)O
Description: with 5% Sb!
Reference: David Singer: Highly oxidized rocks from the San Gorgonio Pass, California; Petrologic and thermodynamic calculations. (Senior honors thesis, Department of Geological Sciences, University of Michigan; advisors: Eric Essene and Casey Donohue).

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
β“˜Hematite4.CB.05Fe2O3
β“˜Hollandite4.DK.05aBa(Mn4+6Mn3+2)O16
β“˜Ilmenite4.CB.05Fe2+TiO3
β“˜Quartz4.DA.05SiO2
β“˜Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Hydroxylapatite8.BN.05Ca5(PO4)3(OH)
Group 9 - Silicates
β“˜Diopside9.DA.15CaMgSi2O6
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜Microcline9.FA.30K(AlSi3O8)
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
β“˜Piemontite9.BG.05a(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
β“˜Spessartine9.AD.25Mn2+3Al2(SiO4)3
β“˜Titanite9.AG.15CaTi(SiO4)O
Unclassified Minerals, Rocks, etc.
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
β“˜'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8

List of minerals for each chemical element

HHydrogen
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Hβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Hβ“˜ HydroxylapatiteCa5(PO4)3(OH)
CCarbon
Cβ“˜ CalciteCaCO3
OOxygen
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Oβ“˜ CalciteCaCO3
Oβ“˜ SpessartineMn32+Al2(SiO4)3
Oβ“˜ QuartzSiO2
Oβ“˜ MicroclineK(AlSi3O8)
Oβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Oβ“˜ HydroxylapatiteCa5(PO4)3(OH)
Oβ“˜ RutileTiO2
Oβ“˜ HematiteFe2O3
Oβ“˜ IlmeniteFe2+TiO3
Oβ“˜ TitaniteCaTi(SiO4)O
Oβ“˜ DiopsideCaMgSi2O6
Oβ“˜ HollanditeBa(Mn64+Mn23+)O16
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
NaSodium
Naβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Mgβ“˜ DiopsideCaMgSi2O6
AlAluminium
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Alβ“˜ SpessartineMn32+Al2(SiO4)3
Alβ“˜ MicroclineK(AlSi3O8)
Alβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
SiSilicon
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Siβ“˜ SpessartineMn32+Al2(SiO4)3
Siβ“˜ QuartzSiO2
Siβ“˜ MicroclineK(AlSi3O8)
Siβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Siβ“˜ TitaniteCaTi(SiO4)O
Siβ“˜ DiopsideCaMgSi2O6
PPhosphorus
Pβ“˜ HydroxylapatiteCa5(PO4)3(OH)
KPotassium
Kβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Kβ“˜ MicroclineK(AlSi3O8)
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
CaCalcium
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caβ“˜ CalciteCaCO3
Caβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Caβ“˜ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caβ“˜ HydroxylapatiteCa5(PO4)3(OH)
Caβ“˜ TitaniteCaTi(SiO4)O
Caβ“˜ DiopsideCaMgSi2O6
TiTitanium
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Tiβ“˜ RutileTiO2
Tiβ“˜ IlmeniteFe2+TiO3
Tiβ“˜ TitaniteCaTi(SiO4)O
MnManganese
Mnβ“˜ SpessartineMn32+Al2(SiO4)3
Mnβ“˜ Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Mnβ“˜ HollanditeBa(Mn64+Mn23+)O16
FeIron
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Feβ“˜ HematiteFe2O3
Feβ“˜ IlmeniteFe2+TiO3
BaBarium
Baβ“˜ HollanditeBa(Mn64+Mn23+)O16

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Smith, David, and Albee, A.L. (1967): Petrology of a Piemontite-bearing Gneiss, San Gorgonio Pass, California. Contributions to Mineralogy and Petrology: 16: 189-203.
Singer, David, Highly oxidized rocks from the San Gorgonio Pass, California; Petrologic and thermodynamic calculations. Senior honors thesis, Department of Geological Sciences, University of Michigan (advisors: Eric Essene and Casey Donohue).

Other Regions, Features and Areas containing this locality

North America
North America Plate
Pacific PlateTectonic Plate
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