The BGS Lexicon of Named Rock Units — Result Details

Worsley Delf Rock

Computer Code: WDR Preferred Map Code: notEntered
Status Code: Full
Age range: Bolsovian Substage (CC) — Bolsovian Substage (CC)
Lithological Description: Sandstone, cross-bedded, brown or yellow, rarely purplish, with subordinate beds of mudstone and sandy mudstone.
Definition of Lower Boundary: The lower boundary is taken at the base of the first sandstone in the sandstone-dominated unit above fissile black mudstone of the Cambriense (Prestwich Top) Marine Band.
Definition of Upper Boundary: The upper boundary is taken at the base of a mudstone-dominated succession of the Pennine Upper Coal Measures Formation above the sandstone of the Worsley Delf Rock.
Thickness: 36 - 55 m thick.
Geographical Limits: South and west Manchester.
Parent Unit: Pennine Upper Coal Measures Formation (PUCM)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Disused quarry, Worsley (no further details available). Location mentioned in Tonks et al, 1931. 
Type Area  The area between Blackmoor (SD 69 01) and Miles Platting (SD 86 00); numerous exposures in the Worsley area (SD 75 01). 
Reference(s):
Tonks, L H, Jones, R C B, Lloyd, W and Sherlock, R L, 1931. The geology of Manchester and the south-east Lancashire Coalfield. Memoir of the Geological Survey of England and Wales. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E084 E085