The BGS Lexicon of Named Rock Units — Result Details

Basal Grit (Millstone Grit of South Wales) [Obsolete: use TWR]

Computer Code: BGM Preferred Map Code: notEntered
Status Code: Index Level
Age range: Pendleian Substage (CE) — Marsdenian Substage (CZ)
Lithological Description: [Obsolete: use TWR]
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): Penlan Quartzite [Obsolete Name And Code: Use BGM] (PQ)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E232 E231 E230 E229