The BGS Lexicon of Named Rock Units — Result Details
Portscatho Formation
| Computer Code: | PORO | Preferred Map Code: | Pto |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Givetian Age (DV) — Frasnian Age (DR) | ||
| Lithological Description: | Interbedded sandstone beds (up to 2m) and slaty mudstone. | ||
| Definition of Lower Boundary: | Carrick Thrust. | ||
| Definition of Upper Boundary: | Veryan Thrust. | ||
| Thickness: | Up to 5.4km. | ||
| Geographical Limits: | Gramscatho Basin, South Cornwall. | ||
| Parent Unit: | Gramscatho Group (GRO) | ||
| Previous Name(s): | Falmouth Beds [Obsolete Name And Code: Use PORO]
(FAB)
Portscatho Beds [Obsolete Name And Code: Use PORO] (PTB) Falmouth Series [Obsolete Name and Code: Use GRO, PORO] (-465) Lower Gramscathos [Obsolete Name And Code: Use PORO] (LGRO) Grampound and Probus Series [Obsolete Name and Code: Use GRO, PORO] (-4266) Lower Gramscatho Beds [Obsolete Name and Code: Use PORO] (-4267) Portscatho Series [Obsolete Name and Code: Use PORO] (-4268) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Gerrans Bay and Carrick Roads. South Cornwall. | ||
| Reference(s): | |||
| Leveridge, B E, Holder, M T and Goode, A J J, 1990. Geology of the country around Falmouth. Memoir of the British Geological Survey, Sheet 352 (England and Wales). | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E352 E353 E354 | |||