The BGS Lexicon of Named Rock Units — Result Details

Northwich Halite Member

Computer Code: NWHF Preferred Map Code: NwH
Status Code: Full
Age range: Anisian Age (TA) — Anisian Age (TA)
Lithological Description: Halite with partings of mudstone.
Definition of Lower Boundary: Conformable at the base of the lowest substantial halite in the member.
Definition of Upper Boundary: Conformable at the top of the highest substantial halite in this member.
Thickness: To 286m
Geographical Limits: Cheshire Basin.
Parent Unit: Sidmouth Mudstone Formation (SIM)
Previous Name(s): Lower Keuper Saliferous Beds [Obsolete Name And Code: Use NWHF] (LKSB)
Keuper Saliferous Beds [Obsolete Name And Code: See DHT, NWHF, WHT] (KSB)
Keuper Saliferous Beds, Lower (-4232)
Northwich Halite Formation (-3591)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Specimens at BGS, Keyworth. Wilkesley Borehole (BGS) SJ64SW/7, from 3541ft 7in to 4166ft 8in. 
Partial Type Section  Meadow Bank Mine, Winsford, and boreholes in the Winsford district. 
Reference(s):
Warrington, G, Audley-Charles, M G, Elliott, R E, Evans, W B, Ivimey-Cook, H C, Kent, P E, Robinson, P L, Shotton, F W and Taylor, F M. 1980. A correlation of the Triassic rocks in the British Isles. Special Report of the Geological Society of London, No.13. 
Howard, A S, Warrington, G, Ambrose, K, and Rees, J G. 2008. A formational framework for the Mercia Mudstone Group (Triassic) of England and Wales. British Geological Survey Research Report, RR/08/04. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E109 E123