The BGS Lexicon of Named Rock Units — Result Details

Coed-yr-allt Formation [Obsolete Name And Code: See HA]

Computer Code: CYAF Preferred Map Code: notEntered
Status Code: Index Level
Age range: Asturian Substage (CAS) — Asturian Substage (CAS)
Lithological Description: none recorded or not applicable
Definition of Lower Boundary: none recorded or not applicable
Definition of Upper Boundary: none recorded or not applicable
Thickness: none recorded or not applicable
Geographical Limits: Shrewsbury and Denbigh coalfields.
Parent Unit: none recorded or not applicable
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Powell, J H, Chisholm, JI, Bridge, D M, Rees, J G, Glover, B W and Besly, B M. 1999. Stratigraphical framework for Westphalian to Early Permian red-bed successions of the Pennine Basin. British Geological Survey Technical Report WA/99/10. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E109