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Little Green Monster Variscite Mine, Clay Canyon, Fairfield, Oquirrh Mts, Utah Co., Utah, USAi
Regional Level Types
Little Green Monster Variscite MineMine (Reclaimed)
Clay CanyonCanyon
Fairfield- not defined -
Oquirrh MtsMountain Range
Utah Co.County
UtahState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84):
40° North , 112° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
Locality type:
Mine (Reclaimed) - last checked 2019
Köppen climate type:
Other/historical names associated with this locality:
Clay Canyon Varischite Mine


A former underground phosphate/gemstone deposit/mine in altered limestone. Also named "Clay Canyon Varischite Mine" (Wilson 2010).

This was the locality that produced the many fine examples of Variscite cherished by collectors. It was actively mined by Ed Over in 1937 and 1938? with the help of Arthur Montgomery. The material is distinctive when compared to Variscite from other localities. The polished nodules always exhibit a rind of yellow Crandallite with not infrequent lines of more yellow Crandallite bisecting in places the green Variscite. Often too there will be additional little spheres of gray green Wardite present as well. Fine polished slices and half nodules of this material will bring more than a thousand dollars.

Very little of the locality can be found today. The entrances to the mine and the dumps have been bulldozed to match the contour of the surrounding hills.

Regions containing this locality

North America PlateTectonic Plate
Rocky Mountains, North AmericaMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


16 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Alunite
Formula: KAl3(SO4)2(OH)6
Reference: Rocks & Minerals (1970): 45(11): 667-674.; Wendell Wilson (2010) The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record 41:321-349
Calcite
Formula: CaCO3
Reference: Rocks & Minerals (1970): 45(11): 667-674.; Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Crandallite
Formula: CaAl3(PO4)(PO3OH)(OH)6
Reference: Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Englishite
Formula: K3Na2Ca10Al15(PO4)21(OH)7 · 26H2O
Reference: Brent Thorne collection; Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Fluorapatite var: Carbonate-rich Fluorapatite
Formula: Ca5(PO4,CO3)3(F,O)
Reference: collected and ID by Ed Over
Gordonite
Formula: MgAl2(PO4)2(OH)2 · 8H2O
Reference: Rocks & Minerals (1970): 45(11): 667-674.; Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Goyazite
Formula: SrAl3(PO4)(PO3OH)(OH)6
Reference: Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Hydroxycalcioroméite
Formula: (Ca,Sb3+)2(Sb5+,Ti)2O6(OH)
Reference: Rocks & Minerals (1970): 45(11): 667-674.; Wendell Wilson (2010) The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record 41:321-349
Hydroxylapatite
Formula: Ca5(PO4)3(OH)
Reference: Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Kolbeckite
Formula: ScPO4 · 2H2O
Reference: Rocks & Minerals (1970): 45(11): 667-674.;Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Rocks & Minerals (1970): 45(11): 667-674.; Wendell Wilson (2010) The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record 41:321-349
Millisite
Formula: (Na,K)CaAl6(PO4)4(OH)9 · 3H2O
Reference: Rocks & Minerals (1970): 45(11): 667-674.; Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Montgomeryite
Formula: Ca4MgAl4(PO4)6(OH)4 · 12H2O
Reference: Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Overite
Formula: CaMgAl(PO4)2(OH) · 4H2O
Reference: Rocks & Minerals (1970): 45(11): 667-674.; Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Quartz
Formula: SiO2
Reference: Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Variscite
Formula: AlPO4 · 2H2O
Reference: Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.
Wardite
Formula: NaAl3(PO4)2(OH)4 · 2H2O
Reference: Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Alunite7.BC.10KAl3(SO4)2(OH)6
Group 8 - Phosphates, Arsenates and Vanadates
Crandallite8.BL.10CaAl3(PO4)(PO3OH)(OH)6
Englishite8.DH.55K3Na2Ca10Al15(PO4)21(OH)7 · 26H2O
Fluorapatite8.BN.05Ca5(PO4)3F
var: Carbonate-rich Fluorapatite8.BN.05Ca5(PO4,CO3)3(F,O)
Gordonite8.DC.30MgAl2(PO4)2(OH)2 · 8H2O
Goyazite8.BL.10SrAl3(PO4)(PO3OH)(OH)6
Hydroxylapatite8.BN.05Ca5(PO4)3(OH)
Kolbeckite8.CD.05ScPO4 · 2H2O
Millisite8.DL.10(Na,K)CaAl6(PO4)4(OH)9 · 3H2O
Montgomeryite8.DH.25Ca4MgAl4(PO4)6(OH)4 · 12H2O
Overite8.DH.20CaMgAl(PO4)2(OH) · 4H2O
Variscite8.CD.10AlPO4 · 2H2O
Wardite8.DL.10NaAl3(PO4)2(OH)4 · 2H2O
Unclassified Minerals, Rocks, etc.
Hydroxycalcioroméite-(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Alunite30.2.4.1KAl3(SO4)2(OH)6
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
(AB)5(XO4)2·xH2O
Kolbeckite40.4.3.3ScPO4 · 2H2O
Variscite40.4.1.1AlPO4 · 2H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
var: Carbonate-rich Fluorapatite41.8.1.4Ca5(PO4,CO3)3(F,O)
Hydroxylapatite41.8.1.3Ca5(PO4)3(OH)
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq·xH2O
Crandallite42.7.3.1CaAl3(PO4)(PO3OH)(OH)6
Goyazite42.7.3.3SrAl3(PO4)(PO3OH)(OH)6
Millisite42.7.9.1(Na,K)CaAl6(PO4)4(OH)9 · 3H2O
Wardite42.7.8.2NaAl3(PO4)2(OH)4 · 2H2O
(AB)3(XO4)2Zq·xH2O
Gordonite42.11.14.4MgAl2(PO4)2(OH)2 · 8H2O
Montgomeryite42.11.8.1Ca4MgAl4(PO4)6(OH)4 · 12H2O
Overite42.11.1.1CaMgAl(PO4)2(OH) · 4H2O
Miscellaneous
Englishite42.13.8.1K3Na2Ca10Al15(PO4)21(OH)7 · 26H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Hydroxycalcioroméite-(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)
'Limonite'-(Fe,O,OH,H2O)

List of minerals for each chemical element

HHydrogen
H VarisciteAlPO4 · 2H2O
H WarditeNaAl3(PO4)2(OH)4 · 2H2O
H CrandalliteCaAl3(PO4)(PO3OH)(OH)6
H KolbeckiteScPO4 · 2H2O
H Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2O
H GordoniteMgAl2(PO4)2(OH)2 · 8H2O
H OveriteCaMgAl(PO4)2(OH) · 4H2O
H AluniteKAl3(SO4)2(OH)6
H Hydroxycalcioroméite(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)
H Limonite(Fe,O,OH,H2O)
H EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2O
H HydroxylapatiteCa5(PO4)3(OH)
H GoyaziteSrAl3(PO4)(PO3OH)(OH)6
H MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2O
CCarbon
C CalciteCaCO3
C Fluorapatite (var: Carbonate-rich Fluorapatite)Ca5(PO4,CO3)3(F,O)
OOxygen
O VarisciteAlPO4 · 2H2O
O WarditeNaAl3(PO4)2(OH)4 · 2H2O
O CrandalliteCaAl3(PO4)(PO3OH)(OH)6
O KolbeckiteScPO4 · 2H2O
O Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2O
O GordoniteMgAl2(PO4)2(OH)2 · 8H2O
O OveriteCaMgAl(PO4)2(OH) · 4H2O
O AluniteKAl3(SO4)2(OH)6
O CalciteCaCO3
O Hydroxycalcioroméite(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)
O Limonite(Fe,O,OH,H2O)
O EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2O
O FluorapatiteCa5(PO4)3F
O HydroxylapatiteCa5(PO4)3(OH)
O GoyaziteSrAl3(PO4)(PO3OH)(OH)6
O MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2O
O QuartzSiO2
O Fluorapatite (var: Carbonate-rich Fluorapatite)Ca5(PO4,CO3)3(F,O)
FFluorine
F FluorapatiteCa5(PO4)3F
F Fluorapatite (var: Carbonate-rich Fluorapatite)Ca5(PO4,CO3)3(F,O)
NaSodium
Na WarditeNaAl3(PO4)2(OH)4 · 2H2O
Na Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2O
Na EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2O
MgMagnesium
Mg GordoniteMgAl2(PO4)2(OH)2 · 8H2O
Mg OveriteCaMgAl(PO4)2(OH) · 4H2O
Mg MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2O
AlAluminium
Al VarisciteAlPO4 · 2H2O
Al WarditeNaAl3(PO4)2(OH)4 · 2H2O
Al CrandalliteCaAl3(PO4)(PO3OH)(OH)6
Al Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2O
Al GordoniteMgAl2(PO4)2(OH)2 · 8H2O
Al OveriteCaMgAl(PO4)2(OH) · 4H2O
Al AluniteKAl3(SO4)2(OH)6
Al EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2O
Al GoyaziteSrAl3(PO4)(PO3OH)(OH)6
Al MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2O
SiSilicon
Si QuartzSiO2
PPhosphorus
P VarisciteAlPO4 · 2H2O
P WarditeNaAl3(PO4)2(OH)4 · 2H2O
P CrandalliteCaAl3(PO4)(PO3OH)(OH)6
P KolbeckiteScPO4 · 2H2O
P Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2O
P GordoniteMgAl2(PO4)2(OH)2 · 8H2O
P OveriteCaMgAl(PO4)2(OH) · 4H2O
P EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2O
P FluorapatiteCa5(PO4)3F
P HydroxylapatiteCa5(PO4)3(OH)
P GoyaziteSrAl3(PO4)(PO3OH)(OH)6
P MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2O
P Fluorapatite (var: Carbonate-rich Fluorapatite)Ca5(PO4,CO3)3(F,O)
SSulfur
S AluniteKAl3(SO4)2(OH)6
KPotassium
K AluniteKAl3(SO4)2(OH)6
K EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2O
CaCalcium
Ca CrandalliteCaAl3(PO4)(PO3OH)(OH)6
Ca Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2O
Ca OveriteCaMgAl(PO4)2(OH) · 4H2O
Ca CalciteCaCO3
Ca Hydroxycalcioroméite(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)
Ca EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2O
Ca FluorapatiteCa5(PO4)3F
Ca HydroxylapatiteCa5(PO4)3(OH)
Ca MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2O
Ca Fluorapatite (var: Carbonate-rich Fluorapatite)Ca5(PO4,CO3)3(F,O)
ScScandium
Sc KolbeckiteScPO4 · 2H2O
TiTitanium
Ti Hydroxycalcioroméite(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)
FeIron
Fe Limonite(Fe,O,OH,H2O)
SrStrontium
Sr GoyaziteSrAl3(PO4)(PO3OH)(OH)6
SbAntimony
Sb Hydroxycalcioroméite(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
U.S. Bureau of Mines Minerals Yearbooks: 1940 - 1942, 1944 - 1946, 1948 - 1949, 195...
Modreski, P. J. (1976): Little Green Monster varischite mine. Mineralogical Record. 7: 269-271.
Wilson, W. (2010): The Clay Canyon Variscite Mine, Fairfield Utah. Mineralogical Record. 41:321-349.

USGS MRDS Record:10108909

Mindat Articles

Clay Canyon & the Little Green Monster Variscite Mine by Dave Crosby



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