The BGS Lexicon of Named Rock Units — Result Details

Temple Cowley Member

Computer Code: TECY Preferred Map Code: TC
Status Code: Full
Age range: Oxfordian Age (JO) — Oxfordian Age (JO)
Lithological Description: Fine-grained silty sands, calcareous sandstones and clayey silts and siltstones, commonly thinly or ripple bedded, may show pronounced bioturbation.
Definition of Lower Boundary: An upward transition from mudstone and silty mudstone of the West Walton Formation to coarser grained predominantly arenaceous sediments.
Definition of Upper Boundary: An upward transition from fine-grained silty sands and clayey silts to coarser grained, calcareous possibly spiculitic sand or sandstone of the Beckley Sand Member, Arngrove Spiculite Member, or very locally, mudstone and limestone of the Littlemore Member.
Thickness: Up to at least 13 m thick.
Geographical Limits: the Oxford to Abingdon area from Wheatley south-westwards. The north-eastern limit which passes into the Arngrove Spiculite Member shown on 1:50000 sheet 237 (inset map). The south-western limit is uncertain, but probably extends at least as far as Faringdon and possibly as far as the Swindon to Calne area.
Parent Unit: Kingston Formation (KTON)
Previous Name(s): Lower Calcareous Grit (-101)
Lower Corallian [Obsolete Name And Code: See TECY, BYSA, KTON] (LCR)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  BGS Garsington No. 1 Borehole (SP50SE/49), 32.91 - 44.82 m depth. Horton et al., 1995. 
Reference Section  Harwell No. 3 Borehole (SU48NE/92), 215.6 - c. 224 m depth. Horton et al., 1995 
Type Area  Headington to Temple Cowley area in the south-east part of Oxford city. 
Reference Section  BGS Cumnor (Henwood Farm) Borehole (SP40SE/11), 31.50 - 45.81 m depth. Horton et al., 1995. 
Reference(s):
Gallois, R W and Worssam, B C. 1983. Stratigraphy of the Harwell boreholes. Institute of Geological Sciences Report FLPU 83-14. 
Cox, B M and Wright, J K, 2001. British Upper Jurassic stratigraphy (Oxfordian to Kimmeridgian). Geological Conservation Review Series, No. 21. (Peterborough: Joint Nature Conservation Committee.) 
Horton, A. 1978. The Cumnor (Henwood Farm) Borehole. p.4 in Institute of Geological Sciences Boreholes. 1976. Institute of Geological Sciences Report 77/10. 
Horton, A, Sumbler, M G, Cox, B M and Ambrose, K, 1995. Geology of the country around Thame. Memoir of the British Geological Survey, Sheet 237 (England and Wales). 
Arkell, W J, 1927. The Corallian rocks of Oxford, Berkshire and north Wiltshire. Philosophical Transactions of the Royal Society of London, Vol.B216, 67-181. 
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:
E237 E236 E252 E253