Kynance Cove, Landewednack, Cornwall, England, UKi
Regional Level Types | |
---|---|
Kynance Cove | Cove |
Landewednack | Civil Parish |
Cornwall | County |
England | Constituent Country |
UK | Country |
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Latitude & Longitude (WGS84):
49° 58' 30'' North , 5° 13' 49'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SW684134
Type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Lizard | 906 (2017) | 1.9km |
Ruan Minor | 558 (2017) | 4.0km |
Mullion | 1,955 (2017) | 5.8km |
Coverack | 255 (2017) | 11.0km |
Gweek | 667 (2017) | 13.5km |
Mindat Locality ID:
1358
Long-form identifier:
mindat:1:2:1358:4
GUID (UUID V4):
d0f51798-558a-4eed-9b10-8b28bfb02eed
This locality is situated on the border between Landewednack and Mullion civil parishes.
Kynance Cove (βPorth Kewnansβ, meaning ravine cove, in Old Cornish) is a cove on the eastern side of Mountβs Bay in Cornwall. It is located on the Lizard peninsula approximately 3 km (2 mi) north of Lizard Point. The cove became popular in the early Victorian era, with many distinguished visitors including Queen Victoria and Prince Albert and the poet Alfred Tennyson. Much of the Lizard peninsula is known for its botany and geology, and about 375 million years ago the molten rock, which eventually became the Lizard, was about 10Β km (6 mi) below the surface of the earth and under immense heat and pressure. One of the rocks (peridotite) is rich in magnesium and iron, and changed through heat and pressure to serpentinite as it pushed upwards from the MohoroviΔiΔ discontinuity, the boundary of the earth's crust and mantle. It finally reached the crust's surface, about 30Β° south of the equator as part of an ocean ridge, in the Rhein Ocean. Over the next 80 million years the Rheic Ocean disappeared and the mass of rock headed north crossing the equator about 250 million years ago. The rock mass, which became the Lizard peninsula, passed the Tropic of Cancer less than 100 million years ago and finally reached 50Β° north at about the start of the last Ice Age.
Cornish geology typically consists of black, folded slates and pale grey, blocky granites. At Kynance Cove however, the cliffs are made up of dark green and red rocks, polished by thousands of years of crashing waves to look like shiny snakeskin. These rocks are types of serpentinite, and occur with dark grey igneous rocks (gabbro) and striped metamorphic rocks (amphibolite) along the Lizard coast from Mullion to Porthallow.
Cornwall written evidence of serpentine usage dates back to 1828, however local traditions would have existed significantly earlier. The popularity of Cornish serpentine as a building material took off after the Great Exhibition of 1851, in which Prince Albert ordered several pieces and souvenirs to be displayed. The Lizard Serpentine Company established a factory at Poltesco in 1855, producing serpentine stonework until 1870. Due to rising costs and falling demand the factory shifted focus to working with marble until finally closing in 1893, the remains of which can still be seen at Carleon Cove. Most of the smaller family-run workshops surrounding Kynance Cove have also since closed, and today only a few local craftspeople remain.
[The name Lizard for the peninsula is most probably a corruption of the Old Cornish name βLys Ardhβ, meaning high court; it is purely coincidental that much of the peninsula is composed of serpentinite-bearing rock.]
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
β 'Asbestos' |
β Calcite Formula: CaCO3 References: |
β Diopside Formula: CaMgSi2O6 |
β Diopside var. Diallage Formula: CaMgSi2O6 |
β Magnetite Formula: Fe2+Fe3+2O4 Colour: Iron-grey Description: Location: behind clifftop above the beach cafΓ©.
5Β°13'46.40"W
49Β°58'34.91"N
Magnetite forms as irregular particles with Hematite and 'Talc' in veins through well-weathered, pale serpentine. Veins range from microscopic to about 1.5mm width. Some magnetite particles appear as minute metallic grains on a polished surface.
Density of the veining is sufficient to render a polished surface attractive to a rare-earth magnet. References: |
β Orthoclase Formula: K(AlSi3O8) |
β Platinum Formula: Pt |
β Quartz Formula: SiO2 References: |
β Quartz var. Agate References: |
β Quartz var. Chalcedony Formula: SiO2 References: |
β Saponite Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
β 'Saussurite' ? |
β 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 |
β Talc Formula: Mg3Si4O10(OH)2 References: |
β Talc var. Steatite Formula: Mg3(Si4O10)(OH)2 |
β 'Tiger's Eye' |
β Tremolite Formula: ◻Ca2Mg5(Si8O22)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
β | Platinum | 1.AF.10 | Pt |
Group 4 - Oxides and Hydroxides | |||
β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
β | Quartz | 4.DA.05 | SiO2 |
β | var. Agate | 4.DA.05 | SiO2 |
β | var. Chalcedony | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
β | Calcite | 5.AB.05 | CaCO3 |
Group 9 - Silicates | |||
β | Diopside var. Diallage | 9.DA.15 | CaMgSi2O6 |
β | 9.DA.15 | CaMgSi2O6 | |
β | Tremolite | 9.DE.10 | β»Ca2Mg5(Si8O22)(OH)2 |
β | Talc var. Steatite | 9.EC.05 | Mg3(Si4O10)(OH)2 |
β | 9.EC.05 | Mg3Si4O10(OH)2 | |
β | Saponite | 9.EC.45 | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 Β· nH2O |
β | Orthoclase | 9.FA.30 | K(AlSi3O8) |
Unclassified | |||
β | 'Asbestos' | - | |
β | 'Tiger's Eye' | - | |
β | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
β | 'Saussurite' ? | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
H | β Talc var. Steatite | Mg3(Si4O10)(OH)2 |
H | β Talc | Mg3Si4O10(OH)2 |
H | β Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
H | β Serpentine Subgroup | D3[Si2O5](OH)4 |
C | Carbon | |
C | β Calcite | CaCO3 |
O | Oxygen | |
O | β Calcite | CaCO3 |
O | β Quartz var. Chalcedony | SiO2 |
O | β Diopside var. Diallage | CaMgSi2O6 |
O | β Diopside | CaMgSi2O6 |
O | β Magnetite | Fe2+Fe23+O4 |
O | β Orthoclase | K(AlSi3O8) |
O | β Quartz | SiO2 |
O | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
O | β Talc var. Steatite | Mg3(Si4O10)(OH)2 |
O | β Talc | Mg3Si4O10(OH)2 |
O | β Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
O | β Serpentine Subgroup | D3[Si2O5](OH)4 |
Mg | Magnesium | |
Mg | β Diopside var. Diallage | CaMgSi2O6 |
Mg | β Diopside | CaMgSi2O6 |
Mg | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
Mg | β Talc var. Steatite | Mg3(Si4O10)(OH)2 |
Mg | β Talc | Mg3Si4O10(OH)2 |
Mg | β Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
Al | Aluminium | |
Al | β Orthoclase | K(AlSi3O8) |
Al | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
Si | Silicon | |
Si | β Quartz var. Chalcedony | SiO2 |
Si | β Diopside var. Diallage | CaMgSi2O6 |
Si | β Diopside | CaMgSi2O6 |
Si | β Orthoclase | K(AlSi3O8) |
Si | β Quartz | SiO2 |
Si | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
Si | β Talc var. Steatite | Mg3(Si4O10)(OH)2 |
Si | β Talc | Mg3Si4O10(OH)2 |
Si | β Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
Si | β Serpentine Subgroup | D3[Si2O5](OH)4 |
K | Potassium | |
K | β Orthoclase | K(AlSi3O8) |
Ca | Calcium | |
Ca | β Calcite | CaCO3 |
Ca | β Diopside var. Diallage | CaMgSi2O6 |
Ca | β Diopside | CaMgSi2O6 |
Ca | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
Ca | β Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
Fe | Iron | |
Fe | β Magnetite | Fe2+Fe23+O4 |
Fe | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
Pt | Platinum | |
Pt | β Platinum | Pt |
Geochronology
Geologic Time | Rocks, Minerals and Events | |||||||||||||||||||||
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Phanerozoic | ||||||||||||||||||||||
Paleozoic | ||||||||||||||||||||||
Permian | ||||||||||||||||||||||
Guadalupian |
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Cisuralian |
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Other Regions, Features and Areas containing this locality
British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
UK
- England
- Cornwall
- Lizard ComplexComplex
- Lizard PeninsulaPeninsula
- Cornwall
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