The BGS Lexicon of Named Rock Units — Result Details

Arun Formation

Computer Code: ARUN Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Holocene Epoch (QH)
Lithological Description: River terrace gravels, sands and associated organic sediments.
Definition of Lower Boundary: Incises bedrock or older superficial deposits.
Definition of Upper Boundary: At surface or overlain by younger deposits including alluvium and head.
Thickness: Average 4m, although may reach 8 to 10m in places.
Geographical Limits: Valley of the Arun River, Haslesmere, Horsham, Chichester district, Sussex.
Parent Unit: Sussex Catchments Subgroup (SXCAT)
Previous Name(s): River Terrace Deposits 1-7 (Arun) (-3176)
Alternative Name(s): Arun Member
Stratotypes:
Type Area  Valley of the Arun River and a tributary valley of the River Lavant, Haslemere, Horsham, Chichester district, Sussex. Aldiss, 2002. 
Reference(s):
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. 
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. 
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). 
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). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E301 E302 E317