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Megiliggar Rocks (Tremearne pegmatite), Breage, Cornwall, England, UKi
Regional Level Types
Megiliggar Rocks (Tremearne pegmatite)- not defined -
BreageCivil Parish
CornwallCounty
EnglandConstituent Country
UKCounty

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Latitude & Longitude (WGS84): 50° 5' 26'' North , 5° 20' 45'' West
Latitude & Longitude (decimal): 50.09056,-5.34583
GeoHash:G#: gbuhyqeq9
UK National Grid Reference:SW607266
Köppen climate type:Cfb : Temperate oceanic climate


No description has been added for this locality. Can you add one?

Regions containing this locality

Devon and Cornwall metalliferous mining district, England, UK

Mining District - 762 mineral species & varietal names listed

Mount's Bay Mining District, Cornwall, England, UK

Mining District - 242 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


18 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.; M. C. George, M. Stone, E. E. Fejer and R. F. Symes (1981). Triplite from the Megiliggar Rocks, Cornwall. Mineralogical Magazine 44:236-238
Alluaudite
Formula: (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Reference: No reference listed
Amblygonite
Formula: LiAl(PO4)F
Reference: M. C. George, M. Stone, E. E. Fejer and R. F. Symes (1981). Triplite from the Megiliggar Rocks, Cornwall. Mineralogical Magazine 44:236-238
'Apatite'
Reference: Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.
Fluorapatite
Formula: Ca5(PO4)3F
Reference: M. C. George, M. Stone, E. E. Fejer and R. F. Symes (1981). Triplite from the Megiliggar Rocks, Cornwall. Mineralogical Magazine 44:236-238
Fluorapatite var: Mn-bearing Fluorapatite
Formula: (Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Fluorite
Formula: CaF2
Reference: Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.
Ixiolite
Formula: (Ta,Nb,Sn,Fe,Mn)4O8
Reference: No reference listed
'Lepidolite'
Reference: No reference listed
Löllingite
Formula: FeAs2
Reference: M. C. George, M. Stone, E. E. Fejer and R. F. Symes (1981). Triplite from the Megiliggar Rocks, Cornwall. Mineralogical Magazine 44:236-238
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: P Haas collection
Muscovite var: Gilbertite
Formula: KAl2(AlSi3O10)(OH)2
Reference: P Haas collection
'Natromontebrasite'
Reference: No reference listed
Nontronite
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Reference: Royal Cornwall Polytechnic Society (1870): 38. Annual Report, pp. 30-31
Orthoclase
Formula: K(AlSi3O8)
Reference: Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.; Econ Geol (1995) 90:495-519
Quartz
Formula: SiO2
Reference: Econ Geol (1995) 90:495-519; M. C. George, M. Stone, E. E. Fejer and R. F. Symes (1981). Triplite from the Megiliggar Rocks, Cornwall. Mineralogical Magazine 44:236-238
Rutile
Formula: TiO2
Reference: No reference listed
Rutile var: Strüverite
Formula: (Ti,Ta,Fe)O2
Reference: No reference listed
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.; Econ Geol (1995) 90:495-519; M. C. George, M. Stone, E. E. Fejer and R. F. Symes (1981). Triplite from the Megiliggar Rocks, Cornwall. Mineralogical Magazine 44:236-238
Topaz
Formula: Al2(SiO4)(F,OH)2
Reference: Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.; M. C. George, M. Stone, E. E. Fejer and R. F. Symes (1981). Triplite from the Megiliggar Rocks, Cornwall. Mineralogical Magazine 44:236-238
Triphylite
Formula: LiFe2+PO4
Reference: No reference listed
Triplite
Formula: (Mn2+,Fe2+)2(PO4)(F,OH)
Reference: M. C. George, M. Stone, E. E. Fejer and R. F. Symes (1981). Triplite from the Megiliggar Rocks, Cornwall. Mineralogical Magazine 44:236-238
Vivianite
Formula: Fe2+3(PO4)2 · 8H2O
Reference: M. C. George, M. Stone, E. E. Fejer and R. F. Symes (1981). Triplite from the Megiliggar Rocks, Cornwall. Mineralogical Magazine 44:236-238
Zwieselite
Formula: (Fe2+,Mn2+)2(PO4)F
Reference: No reference listed

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Löllingite2.EB.15aFeAs2
Group 3 - Halides
'Fluorite'3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Ixiolite4.DB.25(Ta,Nb,Sn,Fe,Mn)4O8
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
var: Strüverite4.DB.05(Ti,Ta,Fe)O2
Group 8 - Phosphates, Arsenates and Vanadates
'Alluaudite'8.AC.10(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
'Amblygonite'8.BB.05LiAl(PO4)F
'Fluorapatite'8.BN.05Ca5(PO4)3F
var: Mn-bearing Fluorapatite8.BN.05(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Triphylite8.AB.10LiFe2+PO4
Triplite8.BB.10(Mn2+,Fe2+)2(PO4)(F,OH)
Vivianite8.CE.40Fe2+3(PO4)2 · 8H2O
Zwieselite8.BB.10(Fe2+,Mn2+)2(PO4)F
Group 9 - Silicates
'Albite'9.FA.35Na(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Gilbertite9.EC.15KAl2(AlSi3O10)(OH)2
Nontronite9.EC.40Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Orthoclase9.FA.30K(AlSi3O8)
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Topaz9.AF.35Al2(SiO4)(F,OH)2
Unclassified Minerals, Rocks, etc.
'Apatite'-
Lepidolite-
Natromontebrasite-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Löllingite2.12.2.9FeAs2
Group 4 - SIMPLE OXIDES
AX2
Rutile4.4.1.1TiO2
var: Strüverite4.4.1.3(Ti,Ta,Fe)O2
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Ixiolite8.1.10.1(Ta,Nb,Sn,Fe,Mn)4O8
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
ABXO4
Triphylite38.1.1.1LiFe2+PO4
(AB)5(XO4)3
Alluaudite38.2.3.6(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
A3(XO4)2·xH2O
Vivianite40.3.6.1Fe2+3(PO4)2 · 8H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Amblygonite41.5.8.1LiAl(PO4)F
'Natromontebrasite'41.5.8.3
A2(XO4)Zq
Triplite41.6.1.2(Mn2+,Fe2+)2(PO4)(F,OH)
Zwieselite41.6.1.1(Fe2+,Mn2+)2(PO4)F
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Topaz52.3.1.1Al2(SiO4)(F,OH)2
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Sheets of 6-membered rings with 2:1 clays
Nontronite71.3.1a.3Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
'Apatite'-
Fluorapatite
var: Mn-bearing Fluorapatite
-(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
'Lepidolite'-
Muscovite
var: Gilbertite
-KAl2(AlSi3O10)(OH)2

List of minerals for each chemical element

HHydrogen
H Muscovite (var: Gilbertite)KAl2(AlSi3O10)(OH)2
H Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
H NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H TopazAl2(SiO4)(F,OH)2
H Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
H VivianiteFe32+(PO4)2 · 8H2O
LiLithium
Li AmblygoniteLiAl(PO4)F
Li TriphyliteLiFe2+PO4
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
O AlbiteNa(AlSi3O8)
O Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
O AmblygoniteLiAl(PO4)F
O FluorapatiteCa5(PO4)3F
O Muscovite (var: Gilbertite)KAl2(AlSi3O10)(OH)2
O Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
O Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
O MuscoviteKAl2(AlSi3O10)(OH)2
O NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
O OrthoclaseK(AlSi3O8)
O QuartzSiO2
O RutileTiO2
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O Rutile (var: Strüverite)(Ti,Ta,Fe)O2
O TopazAl2(SiO4)(F,OH)2
O TriphyliteLiFe2+PO4
O Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
O VivianiteFe32+(PO4)2 · 8H2O
O Zwieselite(Fe2+,Mn2+)2(PO4)F
FFluorine
F AmblygoniteLiAl(PO4)F
F FluorapatiteCa5(PO4)3F
F FluoriteCaF2
F Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
F TopazAl2(SiO4)(F,OH)2
F Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
F Zwieselite(Fe2+,Mn2+)2(PO4)F
NaSodium
Na AlbiteNa(AlSi3O8)
Na Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Na NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mg Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
AlAluminium
Al AlbiteNa(AlSi3O8)
Al AmblygoniteLiAl(PO4)F
Al Muscovite (var: Gilbertite)KAl2(AlSi3O10)(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Al OrthoclaseK(AlSi3O8)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al TopazAl2(SiO4)(F,OH)2
SiSilicon
Si AlbiteNa(AlSi3O8)
Si Muscovite (var: Gilbertite)KAl2(AlSi3O10)(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Si OrthoclaseK(AlSi3O8)
Si QuartzSiO2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si TopazAl2(SiO4)(F,OH)2
PPhosphorus
P Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
P AmblygoniteLiAl(PO4)F
P FluorapatiteCa5(PO4)3F
P Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
P TriphyliteLiFe2+PO4
P Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
P VivianiteFe32+(PO4)2 · 8H2O
P Zwieselite(Fe2+,Mn2+)2(PO4)F
ClChlorine
Cl Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
KPotassium
K Muscovite (var: Gilbertite)KAl2(AlSi3O10)(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
CaCalcium
Ca Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Ca FluorapatiteCa5(PO4)3F
Ca FluoriteCaF2
Ca Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
TiTitanium
Ti RutileTiO2
Ti Rutile (var: Strüverite)(Ti,Ta,Fe)O2
MnManganese
Mn Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Mn Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
Mn Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Mn Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
Mn Zwieselite(Fe2+,Mn2+)2(PO4)F
FeIron
Fe Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Fe LöllingiteFeAs2
Fe NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe Rutile (var: Strüverite)(Ti,Ta,Fe)O2
Fe TriphyliteLiFe2+PO4
Fe Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
Fe VivianiteFe32+(PO4)2 · 8H2O
Fe Zwieselite(Fe2+,Mn2+)2(PO4)F
AsArsenic
As LöllingiteFeAs2
NbNiobium
Nb Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
TaTantalum
Ta Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
Ta Rutile (var: Strüverite)(Ti,Ta,Fe)O2

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Late Devonian
358.9 - 382.7 Ma



ID: 3135052
Late Devonian claystone

Age: Late Devonian (358.9 - 382.7 Ma)

Lithology: Claystone

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
M. C. George, M. Stone, E. E. Fejer and R. F. Symes (1981). Triplite from the Megiliggar Rocks, Cornwall. Mineralogical Magazine 44:236-238


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