| 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): |
| 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. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E336
|
