|Latitude & Longitude (WGS84):||50° 8' 43'' North , 5° 41' 38'' West|
|Latitude & Longitude (decimal):||50.1452777778, -5.69388888889|
|Other regions containing this locality:||Devon and Cornwall metalliferous mining district, England, UK|
This entry refers to the cliff section north of the Crowns Rock and south of Wheal Cock Zawn. The cliffs are unnamed on the topographic map, but most of them form part of Botallack Head, which is located in the center of the area and adjoins Wheal Cock Zawn to the south. Russell (1910) refers to the locality as Wheal Cock Carn and states that this name (which does not appear on maps) was used in the past for an elevated portion of the cliff south of Wheal Cock. Other authors variously refer to the area vaguely as "rocks between Botallack and Wheal Cock" or as "cliffs north of Botallack". The grid reference is centered on Botallack Head.
The veins in this area are hosted in greenstones, a narrow belt of which runs through the granite mass and crops out in the cliffs around Botallack Head. Prehnite and natrolite reported from the Botallack area do only occur at this place. In addition, the veins produced many fine axinite specimens, and many specimens sold that were labelled as coming from Roscommon Cliff were really found in this area.
9 valid minerals.
|Geologic Time||Rocks, Minerals and Events|
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
358.9 - 443.8 Ma
|Silurian-Devonian sedimentary rocks|
Hall, T.M. (1868): The Mineralogist's Directory or, A Guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford (London), 168 pp.
Russell, A. (1910): Notes on the Occurrence of Zeolites in Cornwall and Devon. Mineralogical Magazine 15, 377-384.