The BGS Lexicon of Named Rock Units — Result Details

Redcliffe Sandstone Member

Computer Code: RESA Preferred Map Code: notEntered
Status Code: Full
Age range: Triassic Period (T) — Triassic Period (T)
Lithological Description: Sandstone, distinctive fine- to medium-grained, deep red, calcareous and ferruginous. Commonly decalcified at shallow depths below the surface, giving rise to an uncemented sand.
Definition of Lower Boundary: Unconformable, at the abrupt base of the red sandstones of the Redcliffe Sandstone Member overlying sandstones and mudstones of Late Carboniferous age.
Definition of Upper Boundary: Conformable and gradational, with interdigitation between red sandstone of the Redcliffe Sandstone and reddish-brown mudstone of the Sidmouth Mudstone Formation (undivided).
Thickness: Up to 65m (Kellaway and Welch, 1993).
Geographical Limits: Crops out in the Bristol area between Bedminster and Winterbourne (Barton et al., 2002).
Parent Unit: Sidmouth Mudstone Formation (SIM)
Previous Name(s): Redcliffe Sandstone [Obsolete Name and Code: Use RESA] (-490)
Redcliffe Sandstone Formation [Obsolete Name and Code: Use RESA] (-1788)
Alternative Name(s): none recorded or not applicable
Type Area  Cliffs along the River Avon, Redcliffe and Southville districts, central Bristol Kellaway and Welch (1993). 
Howard, A S, Warrington, G, Ambrose, K, and Rees, J G. 2008. A formational framework for the Mercia Mudstone Group (Triassic) of England and Wales. British Geological Survey Research Report, RR/08/04. 
Kellaway, G A and Welch, F B A. 1993. Geology of the Bristol district. Memoir of the British Geological Survey Special Sheet [England and Wales]. 
Barton, C M, Strange, P J, Royse, K R and Farrant, A R. 2002. Geology of the Bristol District - a brief explanation of the geological map. Sheet explanation of the British Geological Survey. 1:50 000 Sheet 264 Bristol [England and Wales]. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: