The BGS Lexicon of Named Rock Units — Result Details

Jee's Member

Computer Code: JMB Preferred Map Code: JM
Status Code: Full
Age range: Comley Series (EC) — Comley Series (EC)
Lithological Description: Sandstone, red to maroon fine-grained, feldspathic and glauconitic, in gently-tapering beds with bimodal tabular-planar and trough cross-bedding. Interbedded with red and green colour-variegated siltstone and mudstone.
Definition of Lower Boundary: Gradational into Tuttle Hill Member. Base taken at lowest bed to show variegation and increased proportions of variegated silty and muddy partings.
Definition of Upper Boundary: Sharp, erosive contact with grey basal conglomerate or maroon calcareous sandstone of Home Farm Member.
Thickness: 5.5m
Geographical Limits: From Nuneaton town centre, extending north-west for 5.2km to Worthington Farm, Mancetter (SP 3533 9199 - SP 3192 9572).
Parent Unit: Hartshill Sandstone Formation (CQ)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  South-east face of Hartshill Quarry, 750m west-south-west of Hill Farm (SP 3425 9360). 
Reference(s):
Brasier, M D, Hewitt, R A and Brasier, C J, 1978. On the late Precambrian - Early Cambrian Hartshill Formation of Warwickshire. Geological Magazine, Vol.115/1, p.21-36. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable