The BGS Lexicon of Named Rock Units — Result Details

Brithdir Beds [Obsolete: use BD]

Computer Code: -1973 Preferred Map Code: notEntered
Status Code: Index Level
Age range: Pennsylvanian Subperiod (CPE) — Pennsylvanian Subperiod (CPE)
Lithological Description: [Obsolete: use BD]
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: none recorded or not applicable
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):
Woodland, A W, Evans, W B and Stephens, J V. 1957. Classification of the Coal Measures of South Wales with Special reference to the Upper Coal Measures. Bulletin of the Geological Survey of Great Britain, No. 13, 39-60. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable