The BGS Lexicon of Named Rock Units — Result Details

Easebourne Member

Computer Code: EBO Preferred Map Code: Eb
Status Code: Full
Age range: Aptian Age (KP) — Aptian Age (KP)
Lithological Description: Fine- to medium-grained glauconitic sands, some very well cemented (calcareous), with minor clay interbeds.
Definition of Lower Boundary: The base is a sharply defined contact on similar but less well cemented sands of the Hythe Formation.
Definition of Upper Boundary: The upper boundary is marked by the incoming of conspicuous clay-rich sands and clays at the base of the Fittleworth Member or at a sharp contact with purplish to reddish brown poorly sorted, medium- to coarse-grained limonitic sand of the Selham Ironshot Sand Member.
Thickness: 0 to 40m.
Geographical Limits: The outcrop is between Chithurst (Gatehouse) SU 83 23 and Petworth SU 98 20, southwestern Weald (Sussex). The extent in the subcrop is unknown but is probably limited against the Hampshire-Dieppe high to the south.
Parent Unit: Sandgate Formation (SAB)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Easbourne Quarry on the Cowdray Estate. Where the member (called the Bargate Stone in Thurrell et al., 1968) was quarried for general use up to 1940. 
Partial Type Section  "Upper Quarry", Easebourne (c.100m east of Easebourne Street near Upper Sowter's). Partial type section that, together with the Lower Quarry, exposes up to 8.8m of the member. Thurrell et al. (1968). 
Reference Section  Reference section for basal contact: "Winter's Pit", near Budgenor, Easebourne. Winters Pit "provides a reference section for the sharply defined base, where some 5.8m of the Easbourne Member rest conformably ... on the Hythe Formation" Aldiss (2002). 
Partial Type Section  "Lower Quarry", Easebourne (adjacent to Easebourne Street near Upper Sowter's). Partial type section that, together with the Upper Quarry, exposes up to 8.8m of the member. Thurrell et al. (1968). 
Reference(s):
Bristow, C R and Wyatt, R J. 1983. Geological notes and local details for 1:10 000 sheets TQ01NW, NE, SW and SE (Pulborough and Storrington). British Geological Survey Technical Report, WA/VG/83/03. 
Holmes, S C A. 1963. Field Meeting to Midhurst. A traverse of the western part of the Vale of Fernhurst, Sussex. Proceedings of the Geologists' Association, Vol.74, 87-90. 
Kirkaldy, J F and Wooldridge, S W. 1938. Notes on the geology of the country around Haslemere and Midhurst, with Report on the Field Meeting to Haslemere and Midhurst. Proceedings of the Geologists' Association, Vol.49, 135-147. 
Samuel, M D A. 1994. Geological notes and local details for 1:10,000 sheets SU82SE, SU92SW and SU92SE (Midhurst, Lodsworth and Petsworth). British Geological Survey Technical Report, WA/94/28. 
Aldiss, D T. 2002. Geology of the Chichester and Bognor district. Sheet Explanation of the British Geological Survey, 1:50 000 Series Sheet 317 and Sheet 332 (England and Wales). 
Kirkaldy, J F. 1933. The Sandgate Beds of the Western Weald. Proceedings of the Geologists' Association, Vol.44, 270-311. 
Casey, R, 1961. The stratigraphical palaeontology of the Lower Greensand. Palaeontology, Vol.3, 487-621. 
Thurrell, R G, Worssam, B C and Edmonds, E A. 1968. Geology of the country around Haslemere. Memoir of the British Geological Survey, sheet 301 (England and Wales). 
Bristow, C R. 1991. Geology of the Petersfield District, Hampshire. Explanation of 1:10,000 Geological sheets SU72NW, 72NE, 72SW, 72SE, 82NW and 82SW. British Geological Survey Technical Report, WA/91/24. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E317 E332