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⇱ Gloddfa Ganol Quarry (Oakley), Ffestiniog, Gwynedd, Wales, UK

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Gloddfa Ganol Quarry (Oakley), Ffestiniog, Gwynedd, Wales, UKi
Regional Level Types
Gloddfa Ganol Quarry (Oakley)Quarry
FfestiniogCommunity
GwyneddCounty
WalesCountry
UKCountry

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Latitude & Longitude (WGS84):
53° 0' 8'' North , 3° 56' 52'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SH693468
Type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Blaenau-Ffestiniog4,005 (2016)1.1km
Llan Ffestiniog864 (2017)5.1km
Penrhyndeudraeth1,546 (2017)11.0km
Trawsfynydd628 (2017)11.2km
Betws-y-Coed1,200 (2015)13.9km
Mindat Locality ID:
61954
Long-form identifier:
mindat:1:2:61954:6
GUID (UUID V4):
0
Other/historical names associated with this locality:
Merionethshire


Slate quarry workings that linked underground to Cwmorthin Quarry; the slates are cut by various basic dykes and tuff turbidite bands known to the miners as "cherts".

Minerals at Gloddfa Ganol Quarry are generally rare, small to microscopic, and usually occur in small cavities within Alpine-type veins within the dykes. However, quartz can occur as crystals up to several centimetres.

The assemblage within the vugs consists of quartz, albite, chlorite, anatase, synchysite, and pyrite with minor apatite, galena, sphalerite and chalcopyrite.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


8 valid minerals.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Anatase
Formula: TiO2
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ Galena
Formula: PbS
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ Sphalerite
Formula: ZnS
ⓘ Synchysite-(Ce)
Formula: CaCe(CO3)2F

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
ⓘAnatase4.DD.05TiO2
Group 5 - Nitrates and Carbonates
ⓘSynchysite-(Ce)5.BD.20cCaCe(CO3)2F
Group 9 - Silicates
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
Cⓘ Synchysite-(Ce)CaCe(CO3)2F
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AnataseTiO2
Oⓘ QuartzSiO2
Oⓘ Synchysite-(Ce)CaCe(CO3)2F
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
Fⓘ Synchysite-(Ce)CaCe(CO3)2F
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ QuartzSiO2
PPhosphorus
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ GalenaPbS
Sⓘ PyriteFeS2
Sⓘ SphaleriteZnS
ClChlorine
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
CaCalcium
Caⓘ Synchysite-(Ce)CaCe(CO3)2F
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiⓘ AnataseTiO2
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
CuCopper
Cuⓘ ChalcopyriteCuFeS2
ZnZinc
Znⓘ SphaleriteZnS
CeCerium
Ceⓘ Synchysite-(Ce)CaCe(CO3)2F
PbLead
Pbⓘ GalenaPbS

Other Regions, Features and Areas containing this locality

British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
EuropeContinent
UK

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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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