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Wheal Hermon (Wheal St Just), Cot Valley, St Just, Cornwall, England, UKi
Regional Level Types
Wheal Hermon (Wheal St Just)Mine
Cot ValleyValley
St JustCivil Parish
CornwallCounty
EnglandConstituent Country
UKCountry

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Key
Latitude & Longitude (WGS84):
50° 7' 0'' North , 5° 41' 51'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SW357307
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
St Just1,957 (2017)1.4km
Madron626 (2017)9.6km
Penzance19,872 (2017)11.4km
Mousehole697 (2017)11.9km
Marazion1,294 (2017)15.9km


The mine was started in 1821 as Wheal St Just with a single shaft sunk on the Hermon lode far down in the valley, just above the high water mark. From 1822, it was worked as Wheal Hermon.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


2 valid minerals.

Detailed Mineral List:

Cassiterite
Formula: SnO2
Reference: M Perry, St Just
Fluorite
Formula: CaF2
Reference: collected by M Perry, St Just

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
AX2
Cassiterite4.4.1.5SnO2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2

List of minerals for each chemical element

OOxygen
O CassiteriteSnO2
FFluorine
F FluoriteCaF2
CaCalcium
Ca FluoriteCaF2
SnTin
Sn CassiteriteSnO2

Geochronology

Geologic TimeRocks, Minerals and Events
Phanerozoic
 Paleozoic
  Permian
   Guadalupian
ⓘ Major polymetallic mineralization~270 MaCornwall, England, UK
   Cisuralian
ⓘ Porphyry dikes intruded (latest age)~275 MaCornwall, England, UK
ⓘ Greisenization (latest age)~280 MaCornwall, England, UK
ⓘ Porphyry dikes intruded (earliest age)~280 MaCornwall, England, UK
ⓘ Formation of metallized pegmatites~285 MaCornwall, England, UK
ⓘ Greisenization (earliest age)~285 MaCornwall, England, UK
ⓘ Emplacement of major plutons~295 MaCornwall, England, UK

Other Regions, Features and Areas containing this locality

British IslesGroup of Islands
Eurasian PlateTectonic Plate
UK

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