The BGS Lexicon of Named Rock Units — Result Details

Middleton Grit Group [Obsolete Name And Code: Part Of SILS; See Also MN]

Computer Code: MDGT Preferred Map Code: notEntered
Status Code: Index Level
Age range: Arnsbergian Substage (CG) — Arnsbergian Substage (CG)
Lithological Description: A group of grit and shales.
Definition of Lower Boundary: Drawn at the base of a shale formation below the Middleton Grit where it rests conformably on sandstone of the Nesfield Sandstone Formation.
Definition of Upper Boundary: Drawn at the conformable upward passage from grit of the Brocka Bank Grit Formation to grit of the Kinderscout Grit Formation.
Thickness: c. 70m
Geographical Limits: Middleton, 2.5km northwest of Ilkley, Yorkshire.
Parent Unit: Millstone Grit Group [See Also MIGR] (MG)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Around Middleton, 2.5km northwest of Ilkley, Yorkshire. 
Reference(s):
Stephens, J V and others, 1942. The faunal divisions of the Millstone Grit Series of Rombalds Moor and neighbourhood. Proceedings of the Yorkshire Geological Society, Vol.24, p.347. 
Stephens, J V, Mitchell, G H and Edwards, W N. 1953. Geology of the country between Bradford and Skipton. Memoir of the Geological Survey of Great Britain, Sheet 69 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable