The BGS Lexicon of Named Rock Units — Result Details

Barn Rock Member

Computer Code: BARO Preferred Map Code: BR
Status Code: Full
Age range: Eocene Epoch (GE) — Eocene Epoch (GE)
Lithological Description: Very fine-grained glauconitic sandstone.
Definition of Lower Boundary: Incoming of glauconitic and concretionary sandstone at the top of the silty clay coarsening upward sequence attributed to Division B (of London Clay) by King (1981).
Definition of Upper Boundary: Erosive contact at the base of the silty clays of Division C (of London Clay), King (1981).
Thickness: 2-3m
Geographical Limits: Eastern Hampshire Basin in the vicinity of Portsmouth and Bognor Regis.
Parent Unit: London Clay Formation (LC)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  Foreshore exposure and intertidal reef at Bognor Regis 
Venables, E M. 1962. The London Clay of Bognor Regis. Proceedings of the Geologists' Association, Vol.72, 245-272. 
King, C. 1981. The stratigraphy of the London Clay and Associated Deposits. Tertiary Research Special Paper No.6, p.158. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable