The Caerverracks, Kennack Cove (Kennack Sands), Kennack, Grade-Ruan, Cornwall, England, UKi
| Regional Level Types | |
|---|---|
| The Caerverracks | Outcrop |
| Kennack Cove (Kennack Sands) | Cove |
| Kennack | - not defined - |
| Grade-Ruan | Civil Parish |
| Cornwall | County |
| England | Constituent Country |
| UK | Country |
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Latitude & Longitude (WGS84):
50° 0' 21'' North , 5° 9' 36'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Ruan Minor | 558 (2017) | 2.1km |
| Coverack | 255 (2017) | 4.9km |
| Lizard | 906 (2017) | 5.3km |
| Mullion | 1,955 (2017) | 6.3km |
| Gweek | 667 (2017) | 10.6km |
Mindat Locality ID:
274656
Long-form identifier:
mindat:1:2:274656:5
GUID (UUID V4):
b27353e8-1ce4-4bf6-bd9c-0cc7664de1fd
This is a rocky outcropping that divides the East and West Beaches of Kennack Sands.
The low cliff surrounding the low hill (Carn Kennack) and the rocky reef are composed mainly of meta-peridotites.
As is usual in this area, mineralised veins run through the bastite serpentinites.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
4 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| β 'Chlorite Group' Habit: Compact, schistose. Colour: Various shades of green Description: Chlorite is common through the fault breccia, occasionally forming pod and lenses. Often mixed with other minerals to produce pale, schistose or earthy masses. |
| β Magnetite Formula: Fe2+Fe3+2O4 Habit: Granular, massive. Colour: Black Description: Found as finely disseminated grains and thread-like networks of veins throughout the Serpentinite rocks.
When disseminated, it is sufficient to render the rock generally magnetic. When in veins, the grains between the veins are essentially non-magnetic. |
| β Saponite Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O Habit: Massive Colour: White Description: Fractures in the meta-Olivenite (Serpentinite)associated with faulting as well as within the fault breccia are frequently fuilled with white saponite. |
| β Sepiolite ? Formula: Mg4(Si6O15)(OH)2 · 6H2O Habit: Massive Colour: White, off-white to yellowish. Description: Several masses of compact, white to off-white material have been observed at this location.
The masses are relatively resilient and erode to rounded forms.
Further investigation is indicated. |
| β 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 Habit: Massive Colour: Dark red to black. Description: The rocks comprising this ourtcrop are primarily meta-Olivenites, characterised as bastite Serpentinite rock. References: |
| β 'Serpentine Subgroup var. Bastite' Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn Colour: Bronze, dark green, black, red etc. Description: The rocks of this outcrop are designated as meta-Olivenite, characterised as Bastite Serpentinite rock. |
| βͺ Talc Formula: Mg3Si4O10(OH)2 Habit: Radial, botyoidal. Also compact to earthy. Colour: White, pearly. Surfaces discoloured to yellowish when exposed to seawater. Description: Associated with saponite veins, many voids are filled with radiating masses of crystalline talc. Expansions in the veins occasionally yield an uneven, botryoidal crust of Talc covering an underlying layer of Saponite. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| Group 9 - Silicates | |||
| β | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
| β | Saponite | 9.EC.45 | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 Β· nH2O |
| β | Sepiolite ? | 9.EE.25 | Mg4(Si6O15)(OH)2 Β· 6H2O |
| Unclassified | |||
| β | 'Chlorite Group' | - | |
| β | 'Serpentine Subgroup var. Bastite' | - | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
| β | '' | - | D3[Si2O5](OH)4 |
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 Sepiolite | Mg4(Si6O15)(OH)2 · 6H2O |
| H | β Talc | Mg3Si4O10(OH)2 |
| H | β Serpentine Subgroup var. Bastite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
| H | β Serpentine Subgroup | D3[Si2O5](OH)4 |
| O | Oxygen | |
| O | β Magnetite | Fe2+Fe23+O4 |
| O | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| O | β Sepiolite | Mg4(Si6O15)(OH)2 · 6H2O |
| O | β Talc | Mg3Si4O10(OH)2 |
| O | β Serpentine Subgroup var. Bastite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
| O | β Serpentine Subgroup | D3[Si2O5](OH)4 |
| Mg | Magnesium | |
| Mg | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| Mg | β Sepiolite | Mg4(Si6O15)(OH)2 · 6H2O |
| Mg | β Talc | Mg3Si4O10(OH)2 |
| Mg | β Serpentine Subgroup var. Bastite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
| Al | Aluminium | |
| Al | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| Al | β Serpentine Subgroup var. Bastite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
| Si | Silicon | |
| Si | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| Si | β Sepiolite | Mg4(Si6O15)(OH)2 · 6H2O |
| Si | β Talc | Mg3Si4O10(OH)2 |
| Si | β Serpentine Subgroup var. Bastite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
| Si | β Serpentine Subgroup | D3[Si2O5](OH)4 |
| Ca | Calcium | |
| Ca | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| Mn | Manganese | |
| Mn | β Serpentine Subgroup var. Bastite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
| Fe | Iron | |
| Fe | β Magnetite | Fe2+Fe23+O4 |
| Fe | β Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
| Fe | β Serpentine Subgroup var. Bastite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
| Ni | Nickel | |
| Ni | β Serpentine Subgroup var. Bastite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
| Zn | Zinc | |
| Zn | β Serpentine Subgroup var. Bastite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
Geochronology
| Geologic Time | Rocks, Minerals and Events | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
EuropeContinent
UK
- England
- Cornwall
- Lizard ComplexComplex
- Lizard PeninsulaPeninsula
- Cornwall
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References
