The BGS Lexicon of Named Rock Units — Result Details

Littlebeck Anhydrite Formation

Computer Code: LIA Preferred Map Code: notEntered
Status Code: Full, pending ratification
Age range: Guadalupian Epoch (PUG) — Lopingian Epoch (PUL)
Lithological Description: Pink-grey, finely crystalline and commonly unevenly laminated anhydrite with local discontinuous laminae of red-brown silty marl.
Definition of Lower Boundary: Drawn at base of anhydrite of the Littlebeck Formation where it rests on red siltstone of the Sleights Formation.
Definition of Upper Boundary: Drawn at upward passage from anhydrite to red-brown mudstones and siltstones of the Roxby Formation.
Thickness: Approx. 1 to 2 metres.
Geographical Limits: Eastern England. (Yorkshire Province).
Parent Unit: Zechstein Group (ZG)
Previous Name(s): Top Anhydrite (-2290)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Littlebeck (F3) Borehole, Littlebeck, Nr. Whitby, North Yorkshire. 
Reference(s):
Pattison, J, 1986. A revised nomenclature for Upper Permian strata in eastern England. "In" Harwood, G M and Smith, D B. (Editors). The English Zechstein and Related Topics. Geological Society Special Publication No.22, 9-17. 
Smith, D B, Brunstrom, R G W, Manning, D I, Simpson, S and Shotton, F W. 1974. A correlation of Permian rocks in the British Isles. Geological Society of London Special Report No. 5. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable