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Unnamed U-Th-REE prospects [1], Forest Falls (Fallsvale; Fallsville; Forest Home), San Bernardino Mountains, San Bernardino Co., California, USAi
Regional Level Types
Unnamed U-Th-REE prospects [1]Group of Prospects
Forest Falls (Fallsvale; Fallsville; Forest Home)- not defined -
San Bernardino MountainsMountain Range
San Bernardino Co.County
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
34° 5' 57'' North , 116° 52' 39'' West
Latitude & Longitude (decimal):
Locality type:
Group of Prospects
Nearest Settlements:
PlacePopulationDistance
Oak Glen638 (2011)8.5km
Big Bear Lake5,213 (2017)16.4km
Cherry Valley6,362 (2011)16.8km
Yucaipa53,328 (2017)16.9km
Big Bear City12,304 (2017)18.2km


A cluster of U-Fe-REE-Th occurrences/prospects located in the N½ T1S, R1E, SBM, approximately 4.1 km (2.6 miles) ENE of of Forest Falls, along the 3 tributaries (Lost Creek, Falls Creek, Alger Creek) of Mill Creek.

NOTE: The geographic coordinates presented were derived from the description provided for this locality (N½ T1S, R1E, SBM) and represent the center of the N½, placing it in the middle of the 3 tributaries stated.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


3 valid minerals.

Detailed Mineral List:

Allanite-(Ce)
Formula: {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Reference: Hewett, Donnel Foster & Jerome Stone (1957), Uranothorite near Forest Home, San Bernardino County, California: American Mineralogist: 42: 104; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 463.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: Hewett, Donnel Foster & Jerome Stone (1957), Uranothorite near Forest Home, San Bernardino County, California: American Mineralogist: 42: 104; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 366; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 463.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Hewett, Donnel Foster & Jerome Stone (1957), Uranothorite near Forest Home, San Bernardino County, California: American Mineralogist: 42: 104; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 366; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 463.
Thorite
Formula: Th(SiO4)
Colour: Dark brown
Description: Occurs as small grains and subhedral crystals in magnetite, biotite, and allanite aggregates.
Reference: Hewett, Donnel Foster & Jerome Stone (1957), Uranothorite near Forest Home, San Bernardino County, California: American Mineralogist: 42: 104; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 366; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 463.
Thorite var: Uranothorite
Formula: (Th,U)SiO4
Colour: Dark brown
Description: Occurs as small grains and subhedral crystals in magnetite, biotite, and allanite aggregates.
Reference: Hewett, Donnel Foster & Jerome Stone (1957), Uranothorite near Forest Home, San Bernardino County, California: American Mineralogist: 42: 104; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 366; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 463.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
Group 9 - Silicates
Allanite-(Ce)9.BG.05b{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Thorite9.AD.30Th(SiO4)
var: Uranothorite9.AD.30(Th,U)SiO4
Unclassified Minerals, Rocks, etc.
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2

List of minerals arranged by Dana 8th Edition classification

Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Thorite51.5.2.3Th(SiO4)
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Allanite-(Ce)58.2.1a.1{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Unclassified Minerals, Mixtures, etc.
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Thorite
var: Uranothorite
-(Th,U)SiO4

List of minerals for each chemical element

HHydrogen
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
OOxygen
O Thorite (var: Uranothorite)(Th,U)SiO4
O MagnetiteFe2+Fe23+O4
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
O ThoriteTh(SiO4)
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
AlAluminium
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
SiSilicon
Si Thorite (var: Uranothorite)(Th,U)SiO4
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Si ThoriteTh(SiO4)
KPotassium
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
CaCalcium
Ca Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
FeIron
Fe MagnetiteFe2+Fe23+O4
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
CeCerium
Ce Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
ThThorium
Th Thorite (var: Uranothorite)(Th,U)SiO4
Th ThoriteTh(SiO4)
UUranium
U Thorite (var: Uranothorite)(Th,U)SiO4

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Hewett, Donnel Foster & Jerome Stone (1957), Uranothorite near Forest Home, San Bernardino County, California: American Mineralogist: 42: 104.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 366.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 463.

Other Regions, Features and Areas containing this locality

North America
Pacific PlateTectonic Plate
USA

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