The BGS Lexicon of Named Rock Units — Result Details
Stourscombe Formation
| Computer Code: | STB | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Famennian Age (DA) — Famennian Age (DA) | ||
| Lithological Description: | Dark grey to green slate; nodular and lenticular limestone. | ||
| Definition of Lower Boundary: | Conformable with the Bealbury Formation. The contact would be distinguished in the field by a gradual transition from the green and blue-grey shale and siltstone with purple shale of the Bealbury Formation to the dark grey to green slate with lenticular limestone of the Stourscombe Formation. | ||
| Definition of Upper Boundary: | Conformable with the Overwood Slate Member of the Liddaton Formation. Transition noted by change from grey/green shales of Stourscombe Formation to the greenish grey silty slate of the Overwood Slate Member. | ||
| Thickness: | Not known. | ||
| Geographical Limits: | none recorded or not applicable | ||
| Parent Unit: | Not Applicable (-) | ||
| Previous Name(s): | Lower Culm [Obsolete Name and Code: Use STB, LCU]
(-3516)
Stourscombe Beds [Obsolete Name and Code: Use STB] (-2450) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Stourscombe Farm. Selwood, 1971. | ||
| Reference(s): | |||
| Selwood, E B. 1958. The Upper Devonian and Carboniferous geology of the Launceston area of Cornwall. Unpublished PhD thesis, University of Bristol. | |||
| Selwood, E B. 1971. Successions at the Devonian-Carboniferous boundary between Boscastle and Dartmoor. Proceedings of the Ussher Society, Vol.2, 275-285. | |||
| Reid, C, Barrow, G, Sherlock, R L, MacAlister, D A and Dewey, H. 1911. The geology of the country around Tavistock and Launceston. Memoir of the Geological Survey of Great Britain, Sheet 337 (England and Wales). | |||
| Selwood, E B. 1961. The Upper Devonian and Lower Carboniferous stratigraphy of Boscastle and Tintagel, Cornwall. Geolgical Magazine, Vol. 98, pp 218-225. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E337 | |||