The BGS Lexicon of Named Rock Units — Result Details
Crocadon Formation [Obsolete: use SME]
Computer Code: | CDON | Preferred Map Code: | notEntered |
---|---|---|---|
Status Code: | Index Level | ||
Age range: | Tournaisian Age (CT) — Namurian Stage (CN) | ||
Lithological Description: | [Obsolete: use SME] Sandstone with interbedded siltstone and shale. | ||
Definition of Lower Boundary: | Thrust fault. | ||
Definition of Upper Boundary: | Not known. | ||
Thickness: | Not known. | ||
Geographical Limits: | East Cornwall - West Devon. | ||
Parent Unit: | none recorded or not applicable | ||
Previous Name(s): | St Mellion Formation
(SME)
St Mellion Formation (SME) |
||
Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Area | Crocadon. | ||
Reference(s): | |||
British Geological Survey. 1993. Tavistock. England and Wales Sheet 337. Solid and Drift 1:50 000 Provisional Series (Keyworth, Nottingham: British Geological Survey.) | |||
Leveridge B E, Holder, M T, Goode, A J J, Scrivener R C, Jones N S and Merriman, R J. 2002. Geology of the Plymouth and south-east Cornwall area. Memoir of the British Geological Survey, Sheet 348 (England and Wales). | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
none recorded or not applicable |