The BGS Lexicon of Named Rock Units — Result Details

Marble Cliff Limestone Member

Computer Code: MCLB Preferred Map Code: MCLB
Status Code: Pending Upgrade
Age range: Frasnian Age (DR) — Frasnian Age (DR)
Lithological Description: Turbiditic limestone beds interbedded with dark grey mudstone.
Definition of Lower Boundary: Conformable with Trevose Slate Formation.
Definition of Upper Boundary: Conformable with the Trevose Slate Formation.
Thickness: 80m
Geographical Limits: Trevose Head - Trevone - Rock, north Cornwall.
Parent Unit: Saltash Formation (SAH)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Cliffs between Roundhole Point and Porthmissen Bridge. Gauss, G A and House, M R, 1972. 
Reference(s):
Kirchgasser, W T, 1970. Conodonts from near the middle/upper Devonian boundary in north Cornwall. Palaeontology, Vol.13, 335-354. 
Thomas, J M, Williams, B J, Clayton, R, Durning, B, Smith, O and Warr, L N, 1998. Geology of the country around Trevose Head and Camelford. Memoir of the British Geological Survey, Sheets 335 and 336 (England and Wales). 
House, M R, 1961. The Devonian successions of the Padstow area. Abstract of the Proceedings of the 3rd conference on the geology and geomorphology of south-west England, 4-5. 
Tucker, M E, 1969. Crinoidal turbidites from the Devonian of Cornwall and their palaeogeographic importance. Sedimentology, Vol.13, 218-290. 
Mouravieff, N A, 1977. Additional conodonts from near the middle/upper Devonian boundary in north Cornwall. A progress report. Proceedings of the Ussher Society, Vol.4, 63-66. 
Gauss, G A and House, M R, 1972. The Devonian successions in the Padstow area, north Cornwall. Journal of the Geological Society of London, Vol.128, 151-172. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E336