The BGS Lexicon of Named Rock Units — Result Details

Pant Formation

Computer Code: PANT Preferred Map Code: notEntered
Status Code: Full
Age range: Arundian Substage (CJ) — Asbian Substage (CR)
Lithological Description: Pale, greenish-grey mudstones, darker in uppermost 3m with thin beds of dark grey sandy limestone. The formation records the accumulation of alluvial and lagoonal (restricted marine) muds along the local margin of the North Wales Dinantian platform.
Definition of Lower Boundary: Rests unconformably on Ordovician mudstones and tuffaceous sandstones of the Allt-tair-ffynnon Formation.
Definition of Upper Boundary: Conformable and gradational contact with porcellanous or coarser-grained limestones of the Leete Limestone Formation.
Thickness: To 90m
Geographical Limits: Pant area (SJ 28 22), south of Oswestry, North Wales.
Parent Unit: Not Applicable (-)
Previous Name(s): Basement Beds Formation [Obsolete Name And Code: See Supplementary Information] (BED)
Basal Shales (-3604)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Disused quarry west of Pant in which grey and red "shale" with beds of sandy limestone were formerly exposed. Wedd et al., 1929 
Reference(s):
Waters, C N, Barclay, W J, Davies, J R and Waters, R A. In press. Stratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/05/06. 
Wedd, C B, Smith, B, King, W B R and Wray, D A. 1929. Geology of the country around Oswestry. Memoir of the Geological Survey of Great Britain, Sheet 137. 
Waters, C N, Waters, R A, Barclay, W J, and Davies, J R. 2009. Lithostratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/09/01. 184pp. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable