The BGS Lexicon of Named Rock Units — Result Details

Pennan Hill Vent

Computer Code: PNHI Preferred Map Code: PEV
Status Code: Index Level
Age range: Emsian Age (DE) — Emsian Age (DE)
Lithological Description: Subvolcanic explosion breccia pipe 75 x 50 m, of mainly wacke breccia, with little or no igneous component.
Definition of Lower Boundary: The intrusive contacts with the country rock is poorly exposed, which together with diffuse internal structures, makes field relationships difficult to define.
Definition of Upper Boundary: none recorded or not applicable
Thickness: Thickness, not known, 75 x 50 m in areal extent
Geographical Limits: Kirkcudbright Sheet 5W (Scotland).
Parent Unit: Black Stockarton Moor Subvolcanic Complex (BSTM)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  A breccia pipe which forms Pennan Hill, 1 km SW of Lochdougan Dairy. Leake & Cooper, 1983. 
Reference(s):
Leake, R C and Cooper, C. 1983. The Black Stockarton Moor Subvolcanic Complex, Galloway. Journal of the Geological Society, London. Vol. 140, 665-676. 
Lintern, B C and Floyd, J D. 2000. Geology of the Kirkcudbright-Dalbeattie District. Memoir of the British Geological Survey, Sheets 5W, 5E and part of 6W (Scotland). 
Rock, N M S, Cooper, C and Gaskarth, J W. 1986 Late Caledonian subvolcanic vents and associated dykes in the Kirkcudbright area, Galloway, South-West Scotland. Proceedings of the Yorkshire Geological Society, Vol. 46, 29-37. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S005