The BGS Lexicon of Named Rock Units — Result Details

Arun Terrace Deposits, 2a Member

Computer Code: AR2A Preferred Map Code: symb
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Sand, sandy gravel, and gravel, locally clayey. Gravel component is predominantly subangular flint with subordinate debris of chert, polished quartz grains, and larger fragments of pebbly ferruginous sandstone derived from Lower Cretaceous sequences to the north.
Definition of Lower Boundary: Unconformably overlies Lower Cretaceous bedrock.
Definition of Upper Boundary: Ground surface.
Thickness: Normally up to 4m, but locally up to 10m.
Geographical Limits: Valley of the Arun River, Haslemere, Horsham, Chichester district, Sussex.
Parent Unit: Arun Terrace Deposits, 2 Member (AR2)
Previous Name(s): River Terrace Deposits, 2a (Arun) (-2566)
Arun Terrace Deposits, Facet 2a (-646)
Alternative Name(s): Part Of Arun Member Of Sussex Valley Formation
Stratotypes:
Type Area  Valley of the River Arun, Sussex. Aldiss, 2002. 
Reference(s):
Gallois, R W and Worssam, B C. 1993. Geology of the country around Horsham. Memoir of the British Geological Survey, Sheet 302 (England and Wales). 130pp. 
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). 
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. 
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). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable