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Eastern Cliff, Kennack Cove (Kennack Sands), Kennack, Grade-Ruan, Cornwall, England, UK

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Latitude & Longitude (WGS84): 50° 0' 25'' North , 5° 8' 46'' West
Latitude & Longitude (decimal): 50.00712,-5.14614
GeoHash:G#: gbuk6zs8w
UK National Grid Reference:SW746167
Locality type:Cliff
Köppen climate type:Cfb : Temperate oceanic climate


Serpentine rocks on the beach below the Eastern Cliff at Kennack Sands, contain white veinlets of Lizardite that when dissolved in dilute Hydrochloric Acid, can reveal the minerals listed.

Regions containing this locality

Lizard Peninsula, Cornwall, England, UK

Peninsula - 127 mineral species & varietal names listed

Lizard Complex, Cornwall, England, UK

Complex - 107 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


11 valid minerals. 1 (TL) - type locality of valid minerals.

Detailed Mineral List:

Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: Golley, P., and Williams, R. (1995): Cornish Mineral Reference Manual. Endsleigh Publications (Truro), 104 pp.
Calcite
Formula: CaCO3
Reference: Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194
'Chlorite Group'
Reference: Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Reference: Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194
Diopside
Formula: CaMgSi2O6
Description: Occurs in waterworn pebbles originating from a rodingite vein.
Reference: Peter Haas; Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194
Dolomite
Formula: CaMg(CO3)2
Reference: Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194
'Garnet Group'
Formula: X3Z2(SiO4)3
Description: Occurs in waterworn pebbles originating from a rodingite vein.
Reference: Peter Haas
Grossular
Formula: Ca3Al2(SiO4)3
Reference: Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194
Hetaerolite
Formula: ZnMn2O4
Reference: Bevins, R.E., Symes, R.F., Hor´ak, J.M., and Holyer, V. (1987): Mineralogical Magazine 51, 172–173
Lizardite (TL)
Formula: Mg3(Si2O5)(OH)4
Reference: No reference listed
Sepiolite
Formula: Mg4(Si6O15)(OH)2 · 6H2O
Reference: Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194
Talc
Formula: Mg3Si4O10(OH)2
Reference: Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194
Vesuvianite
Formula: (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Colour: Lavender, Purple
Description: Power et al. (1997) report purple vesuvianite as a constituent of rodingite inclusions in serpentinite. A qualitative element overview by ICP-AES showed significant manganese among the trace impurities (Peter Haas).
Reference: Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194
Vesuvianite var: Manganoan Vesuvianite
Formula: (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Colour: Lavender, Purple
Description: Power et al. (1997) report purple vesuvianite as a constituent of rodingite inclusions in serpentinite. A qualitative element overview by ICP-AES showed significant manganese among the trace impurities (Peter Haas).
Reference: Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Proceedings of the Ussher Society 9, 188-194

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Hetaerolite'4.BB.10ZnMn2O4
Group 5 - Nitrates and Carbonates
'Ankerite'5.AB.10Ca(Fe2+,Mg)(CO3)2
'Calcite'5.AB.05CaCO3
'Dolomite'5.AB.10CaMg(CO3)2
Group 9 - Silicates
'Chrysotile'9.ED.15Mg3(Si2O5)(OH)4
'Diopside'9.DA.15CaMgSi2O6
'Grossular'9.AD.25Ca3Al2(SiO4)3
'Lizardite' (TL)9.ED.15Mg3(Si2O5)(OH)4
Sepiolite9.EE.25Mg4(Si6O15)(OH)2 · 6H2O
Talc9.EC.05Mg3Si4O10(OH)2
Vesuvianite9.BG.35(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
var: Manganoan Vesuvianite9.BG.35(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3

List of minerals arranged by Dana 8th Edition classification

Group 7 - MULTIPLE OXIDES
AB2X4
Hetaerolite7.2.7.2ZnMn2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Grossular51.4.3b.2Ca3Al2(SiO4)3
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)
Vesuvianite58.2.4.1(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Chrysotile71.1.5.1Mg3(Si2O5)(OH)4
Lizardite (TL)71.1.2b.2Mg3(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Talc71.2.1.3Mg3Si4O10(OH)2
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Sepiolite74.3.1b.1Mg4(Si6O15)(OH)2 · 6H2O
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
Vesuvianite
var: Manganoan Vesuvianite
-(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10

List of minerals for each chemical element

HHydrogen
H ChrysotileMg3(Si2O5)(OH)4
H LizarditeMg3(Si2O5)(OH)4
H Vesuvianite (var: Manganoan Vesuvianite)(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
H SepioliteMg4(Si6O15)(OH)2 · 6H2O
H TalcMg3Si4O10(OH)2
H Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
BBoron
B Vesuvianite (var: Manganoan Vesuvianite)(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
B Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
CCarbon
C AnkeriteCa(Fe2+,Mg)(CO3)2
C CalciteCaCO3
C DolomiteCaMg(CO3)2
OOxygen
O AnkeriteCa(Fe2+,Mg)(CO3)2
O CalciteCaCO3
O ChrysotileMg3(Si2O5)(OH)4
O DiopsideCaMgSi2O6
O DolomiteCaMg(CO3)2
O Garnet GroupX3Z2(SiO4)3
O GrossularCa3Al2(SiO4)3
O HetaeroliteZnMn2O4
O LizarditeMg3(Si2O5)(OH)4
O Vesuvianite (var: Manganoan Vesuvianite)(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
O SepioliteMg4(Si6O15)(OH)2 · 6H2O
O TalcMg3Si4O10(OH)2
O Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
FFluorine
F Vesuvianite (var: Manganoan Vesuvianite)(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
F Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
NaSodium
Na Vesuvianite (var: Manganoan Vesuvianite)(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Na Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg ChrysotileMg3(Si2O5)(OH)4
Mg DiopsideCaMgSi2O6
Mg DolomiteCaMg(CO3)2
Mg LizarditeMg3(Si2O5)(OH)4
Mg Vesuvianite (var: Manganoan Vesuvianite)(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Mg SepioliteMg4(Si6O15)(OH)2 · 6H2O
Mg TalcMg3Si4O10(OH)2
Mg Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
AlAluminium
Al GrossularCa3Al2(SiO4)3
Al Vesuvianite (var: Manganoan Vesuvianite)(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Al Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
SiSilicon
Si ChrysotileMg3(Si2O5)(OH)4
Si DiopsideCaMgSi2O6
Si Garnet GroupX3Z2(SiO4)3
Si GrossularCa3Al2(SiO4)3
Si LizarditeMg3(Si2O5)(OH)4
Si Vesuvianite (var: Manganoan Vesuvianite)(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Si SepioliteMg4(Si6O15)(OH)2 · 6H2O
Si TalcMg3Si4O10(OH)2
Si Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
CaCalcium
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca CalciteCaCO3
Ca DiopsideCaMgSi2O6
Ca DolomiteCaMg(CO3)2
Ca GrossularCa3Al2(SiO4)3
Ca Vesuvianite (var: Manganoan Vesuvianite)(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Ca Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
MnManganese
Mn HetaeroliteZnMn2O4
FeIron
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe Vesuvianite (var: Manganoan Vesuvianite)(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Fe Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
ZnZinc
Zn HetaeroliteZnMn2O4

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

Permian
251.902 - 298.9 Ma



ID: 3186762
Paleozoic intrusive rocks

Age: Phanerozoic (251.902 - 298.9 Ma)

Lithology: Intrusive igneous 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]

Carboniferous
298.9 - 358.9 Ma



ID: 3142781
Carboniferous gabbro

Age: Carboniferous (298.9 - 358.9 Ma)

Lithology: Gabbro

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]

Devonian
358.9 - 419.2 Ma



ID: 2027180
Unnamed Igneous Intrusion, Devonian

Age: Devonian (358.9 - 419.2 Ma)

Lithology: Ultramafitite

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

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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Midgley, H.G. (1951): A serpentine mineral from Kennack Cove, Lizard, Cornwall. Mineralogical Magazine 29, 526-530.
Bevins, R.E., Symes, R.F., Hor´ak, J.M., and Holyer, V. (1987): Hetaerolite from Eastern Cliff, Kennack Sands, Cornwall: the first British occurrence. Mineralogical Magazine 51, 172–173.
Power, M.R., Shail, R.K., Alexander, A.C., and Scott, P.W. (1997): Alteration and vein mineralisation within the Lizard complex, south Cornwall: constraints on the timing of serpentinisation. Proceedings of the Ussher Society 9, 188-194.


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