The BGS Lexicon of Named Rock Units — Result Details

Nant Hir Formation

Computer Code: NAH Preferred Map Code: NAH
Status Code: Pending Upgrade
Age range: Costonian Substage (OO) — Soudleyan Substage (OY)
Lithological Description: Not defined. NOTE: Details as for Nant-Hir Shales. Name only modified.
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: Not Entered (?)
Previous Name(s): Nant Hir Shales (-4214)
Nant-Hir Shales [Obsolete Name And Code: Use NAH] (NSH)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Lockley, M G. 1980. The geology of the Llanuwchllyn to Llanmawddwy area, south Gwynedd, North Wales. Geological Journal, Vol.15, 21-41. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E120 E136