North Cornwall - Geology
Elvan Dyke - Hoblyn's Cove (S13)
One of the Elvan Dykes in Hoblyn's Cove.
Elvan is very hard volcanic rock . Chemically similar to Granite.
Magma intruded into other rocks to form a (vertical) dyke cooling quickly - resulting in fairly small crystals.
It can be finely carved and is often used for intricate parts of buildings.
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Hoblyn's Cove is south of Holywell Beach and to the west of Penhale Military Camp in Gallery 13
Ref: 4076
Date: 22/09/2016
Location: SW 758 580