The BGS Lexicon of Named Rock Units — Result Details

Pusey Flags Member

Computer Code: PYF Preferred Map Code: PF
Status Code: Pending Upgrade
Age range: Oxfordian Age (JO) — Oxfordian Age (JO)
Lithological Description: Cross-bedded fissile sandy ooidal limestone passing to ooidal calcareous mudstone in the Highworth area. Common lignite fragments and bivalves, rare ammonites.
Definition of Lower Boundary: Base taken at change up from shelly ooidal limestone (Highworth Limestone Member) into sandy ooidal limestone or ooidal calcareous mudstone of the Pusey Flags Member.
Definition of Upper Boundary: Top taken at change up from sandy ooidal limestone or calcareous mudstone of the Pusey Flags Member into grey or brown sandy mudstone (Highworth Clay Member, where present) or sand or sandstone with ooids (Highworth Grit Member).
Thickness: To 6m in the type area.
Geographical Limits: Southwest Oxfordshire: Faringdon to Garford, where overstepped by Stanford Formation. May be present at Highworth (Arkell, 1939, p.502). Pusey Flags mapped with underlying Highworth Limestone (g11a orange) on BGS 1:50 000 sheet 253 Abingdon, 1971 edition.
Parent Unit: Kingston Formation (KTON)
Previous Name(s): Pusey Flags (-2989)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Pusey, Oxfordshire, no exposures currently known. Arkell, 1939. 
Reference(s):
Arkell, W J. 1939. Map of the Corallian Beds between Marcham and Faringdon, Berkshire. Proceedings of the Geologists' Association, Vol.50, 487-509. 
Wright, J K, and Cox, B M. 2001. British Upper Jurassic Stratigraphy (Oxfordian to Kimmeridgian). Geological Conservation Review Series. No. 21. (Peterborough: Joint Nature Conservation Committee/Chapman and Hall.) 
Arkell, W J. 1941a. Map of the Corallian Beds around Highworth, Wiltshire. Proceedings of the Geologists' Association, Vol.52, 79-109. 
Wright, J K and Cope, J C W. In press. Oxfordian - Kimmeridgian Correlation Chart. In: A correlation of Jurassic rocks in the British Isles: Middle and Upper Jurassic. Cope, J C W (editor). Special Report of the Geological Society of London. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E253