The BGS Lexicon of Named Rock Units — Result Details

Eskdale Group [Obsolete Name And Code: See ZG]

Computer Code: EKD Preferred Map Code: notEntered
Status Code: Index Level
Age range: Guadalupian Epoch (PUG) — Triassic Period (T)
Lithological Description: Siltstone, anhydrite and saliferous marl.
Definition of Lower Boundary: Drawn at base of the Sleights Siltstone Formation where it rests conformably on the Sneaton Halite Formation.
Definition of Upper Boundary: Drawn at conformable upward passage from the Roxby Formation to the Sherwood Sandstone Group.
Thickness: Up to about 150m
Geographical Limits: Eastern England.
Parent Unit: Not Entered (?)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Eskdale No. 3 (Sleights) Borehole, near Whitby. 
Reference(s):
Rayner, D H, and Hemingway, J E (editors). 1974. The geology and mineral resources of Yorkshire. (Leeds: Yorkshire Geological Society.) 
Stewart, F H, 1954. Permian evaporites and associated rocks in Texas and New Mexico compared with those of northern England. Proceedings of the Yorkshire Geological Society, Vol.29, p.185-231. 
Smith, D B, Harwood, G M, Pattison, J and Pettigrew, T H. 1986. A revised nomenclature for Upper Permian strata in eastern England. 9-17 in Harwood, G M and Smith, D B (editors). The English Zechstein and Related Topics. Geological Society Special Publication No.22. 
Armstrong, G and others, 1951. The paragenesis of sylvine, carnallite, polyhalite and kierserite in Eskdale Borings Nos.3, 4 and 6, north-east Yorkshire. Mineralogical Magazine, Vol.29, Figure 2, No.214, 667-689. 
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