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Pwll Du Head, Bishopston, Swansea, Wales, UK

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Latitude & Longitude (WGS84): 51° 33' 48'' North , 4° 3' 21'' West
Latitude & Longitude (decimal): 51.56337,-4.05609
GeoHash:G#: gcjj7dy6q
UK National Grid Reference:SS575870
Locality type:Headland
Köppen climate type:Cfb : Temperate oceanic climate
Other/historical names associated with this locality:West Glamorgan; Glamorgan


Original site for wavellite at this locality (1907) occurred in a bank above the quarry and is no longer accessable. Modern material has been found mainly on the storm beach below the old quarry.

More recently, variscite as rare pale green spheres to 1mm and micro cacoxinite and crandallite have all been confirmed by XRD at the National Museum of Wales, and represent the first Welsh occurrences of these minerals.

The location lies in the parish of Pennard.

Regions containing this locality

Glamorgan, Wales, UK

101 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

12 valid minerals.

Detailed Mineral List:

Cacoxenite
Formula: Fe3+24AlO6(PO4)17(OH)12 · 75H2O
Reference: No reference listed
Calcite
Formula: CaCO3
Chamosite
Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Crandallite
Formula: CaAl3(PO4)(PO3OH)(OH)6
Reference: No reference listed
Goethite
Formula: α-Fe3+O(OH)
Hematite
Formula: Fe2O3
Hematite var: Specularite
Formula: Fe2O3
Marcasite
Formula: FeS2
Pyrite
Formula: FeS2
Pyrrhotite
Formula: Fe7S8
Quartz
Formula: SiO2
Variscite
Formula: AlPO4 · 2H2O
Reference: Ian Jones collection
Wavellite
Formula: Al3(PO4)2(OH,F)3 · 5H2O
Reference: No reference listed

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Marcasite'2.EB.10aFeS2
'Pyrite'2.EB.05aFeS2
'Pyrrhotite'2.CC.10Fe7S8
Group 4 - Oxides and Hydroxides
'Goethite'4.00.α-Fe3+O(OH)
'Hematite'4.CB.05Fe2O3
var: Specularite4.CB.05Fe2O3
'Quartz'4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
'Cacoxenite'8.DC.40Fe3+24AlO6(PO4)17(OH)12 · 75H2O
'Crandallite'8.BL.10CaAl3(PO4)(PO3OH)(OH)6
Variscite8.CD.10AlPO4 · 2H2O
Wavellite8.DC.50Al3(PO4)2(OH,F)3 · 5H2O
Group 9 - Silicates
'Chamosite'9.EC.55(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
(AB)5(XO4)2·xH2O
Variscite40.4.1.1AlPO4 · 2H2O
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq·xH2O
Crandallite42.7.3.1CaAl3(PO4)(PO3OH)(OH)6
A3(XO4)2Zq·xH2O
Wavellite42.10.2.1Al3(PO4)2(OH,F)3 · 5H2O
Miscellaneous
Cacoxenite42.13.5.1Fe3+24AlO6(PO4)17(OH)12 · 75H2O
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
Unclassified Minerals, Rocks, etc.
Hematite
var: Specularite
-Fe2O3

List of minerals for each chemical element

HHydrogen
H CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
H Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
H CrandalliteCaAl3(PO4)(PO3OH)(OH)6
H Goethiteα-Fe3+O(OH)
H VarisciteAlPO4 · 2H2O
H WavelliteAl3(PO4)2(OH,F)3 · 5H2O
CCarbon
C CalciteCaCO3
OOxygen
O CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
O CalciteCaCO3
O Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
O CrandalliteCaAl3(PO4)(PO3OH)(OH)6
O Goethiteα-Fe3+O(OH)
O HematiteFe2O3
O QuartzSiO2
O Hematite (var: Specularite)Fe2O3
O VarisciteAlPO4 · 2H2O
O WavelliteAl3(PO4)2(OH,F)3 · 5H2O
MgMagnesium
Mg Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
AlAluminium
Al CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
Al Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Al CrandalliteCaAl3(PO4)(PO3OH)(OH)6
Al VarisciteAlPO4 · 2H2O
Al WavelliteAl3(PO4)2(OH,F)3 · 5H2O
SiSilicon
Si Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Si QuartzSiO2
PPhosphorus
P CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
P CrandalliteCaAl3(PO4)(PO3OH)(OH)6
P VarisciteAlPO4 · 2H2O
P WavelliteAl3(PO4)2(OH,F)3 · 5H2O
SSulfur
S MarcasiteFeS2
S PyriteFeS2
S PyrrhotiteFe7S8
CaCalcium
Ca CalciteCaCO3
Ca CrandalliteCaAl3(PO4)(PO3OH)(OH)6
FeIron
Fe CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
Fe Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
Fe MarcasiteFeS2
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
Fe Hematite (var: Specularite)Fe2O3

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 Triassic - Middle Triassic
201.3 - 247.2 Ma



ID: 3158250
Middle Triassic claystone

Age: Triassic (201.3 - 247.2 Ma)

Lithology: Major:{claystone}, Minor{siltstone,sandstone,gypsum}

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]

Mississippian
323.2 - 358.9 Ma



ID: 2036252
Dinantian Rocks (Undifferentiated)

Age: Mississippian (323.2 - 358.9 Ma)

Lithology: Limestone with subordinate sandstone and argillaceous rocks

Reference: British Geological Survey. DiGMapGB-625. British Geological Survey ©NERC. [23]

Silurian
419.2 - 443.8 Ma



ID: 3185808
Paleozoic sedimentary rocks

Age: Silurian (419.2 - 443.8 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

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

Localities in this Region
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UK

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