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Granite Quarry, Shannapheasteen, Costelloe, Connemara, County Galway, Connacht, Irelandi
Regional Level Types
Granite QuarryQuarry
Shannapheasteen- not defined -
Costelloe- not defined -
Connemara- not defined -
County GalwayCounty
ConnachtProvince
IrelandCountry

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Key
Latitude & Longitude (WGS84):
53° 20' 19'' North , 9° 26' 29'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Oughterard1,333 (2013)11.2km
Carraroe814 (2013)13.3km
Spiddal250 (2013)13.8km
Rosscahill295 (2017)14.0km
Moycullen1,559 (2013)17.3km


The quarry is situated geologically within the distinctive ‘Shannapheasteen Granite’ pluton, an enclosed pluton within the central block of the Galway Granite Batholith (Geological Survey of Ireland, 1;100,000 Map Sheet 14). These granites have been dated as early-middle Devonian in age (c. 395 million years old). The Shannapheasteen Granite is described by the Geological Survey of Ireland as an “aphyric, fine grained granite”.

Occasionally, late stage veins bearing fluorite, galena, sphalerite and cerussite appear during quarry works. In 2015 an exceptional find of fluorite was made. It was first purchased and dealt by Thames Valley Minerals (U.K.), and subsequently by Moorland Minerals. Note: there is no public access to this quarry. The quarry owners view the fluorite as a by-product of their business. They recover the specimens themselves and have private arrangements for its distribution to selected mineral dealers.

For more information, please refer to the provided links.

Select Mineral List Type

Standard Detailed Gallery Strunz Dana Chemical Elements

Mineral List


7 valid minerals.

Detailed Mineral List:

Cerussite
Formula: PbCO3
Reference: https://e-rocks.com/taxonomy/term/69955; https://e-rocks.com/blogs/1/connemara-blue
Chamosite
Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Reference: Dr Stephen Moreton collection
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: https://e-rocks.com/taxonomy/term/69955; https://e-rocks.com/blogs/1/connemara-blue
Fluorite
Formula: CaF2
Reference: https://e-rocks.com/taxonomy/term/69955; https://e-rocks.com/blogs/1/connemara-blue
Galena
Formula: PbS
Reference: https://e-rocks.com/taxonomy/term/69955; https://e-rocks.com/blogs/1/connemara-blue
Quartz
Formula: SiO2
Reference: https://e-rocks.com/blogs/1/connemara-blue
Sphalerite
Formula: ZnS
Reference: https://e-rocks.com/taxonomy/term/69955; https://e-rocks.com/blogs/1/connemara-blue

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Galena2.CD.10PbS
Sphalerite2.CB.05aZnS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Cerussite5.AB.15PbCO3
Group 9 - Silicates
Chamosite9.EC.55(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Cerussite14.1.3.4PbCO3
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)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Chamosite71.4.1.7(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

HHydrogen
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
CCarbon
C CerussitePbCO3
OOxygen
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O CerussitePbCO3
O QuartzSiO2
O Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
FFluorine
F FluoriteCaF2
MgMagnesium
Mg Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
SiSilicon
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
SSulfur
S GalenaPbS
S SphaleriteZnS
CaCalcium
Ca FluoriteCaF2
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
ZnZinc
Zn SphaleriteZnS
PbLead
Pb GalenaPbS
Pb CerussitePbCO3

External Links


Other Regions, Features and Areas containing this locality

British IslesGroup of Islands
Eurasian PlateTectonic Plate
EuropeContinent

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
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