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 
King, C, 1981. The stratigraphy of the London Clay and associated deposits. Tertiary Research Special Paper No.6. (Backhuys: Rotterdam). 
Venables, E M. 1962. The London Clay of Bognor Regis. Proceedings of the Geologists' Association, Vol.72, 245-272. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable