The BGS Lexicon of Named Rock Units — Result Details

Nurseries Formation

Computer Code: NURS Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Pleistocene Epoch (QP)
Lithological Description: Comprises the older of the two pre-Devensian glacial successions identified in the Birmingham area. Predominantly tills, sands and gravels and laminated glaciolacustrine clays. Characteristically lacks Scottish and Lake districts erratics (which characterise the Stockport Formation), and northern and eastern (e.g. Cretaceous) erratics (which are found in the pre-Devensian Wolston Formation). At the type locality it comprises brown till with abundant erratics (mainly local Upper Carboniferous rocks but including rocks of western derivation such as North Welsh rhyolite), together with sands and gravels and laminated clays. Represented by sand and gravel and laminated clay at Nechells. At both localities underlies the organic Quinton Beds ("Hoxnian"). Full geographic exent and thus full range of lithology uncertain.
Definition of Lower Boundary: Rests upon Permo-Triassic and Palaeozoic bedrock.
Definition of Upper Boundary: At type locality and at Nechells, overlain by the organic Quinton Beds ("Hoxnian"). Elsewhere and more generally, inferred to be overlain by the Ridgacre Formation, or depending on lateral extent, younger Quaternary deposits (head, fluvial deposits) or ground surface. Remnants may be present inside the Devensian limit beneath the Stockport Formation.
Thickness: Up to c 20 to 25m at type locality and Nechells.
Geographical Limits: Full extent highly uncertain pending further work, but likely to be fairly widespread in and to the south of the Birmingham area (Sheet 168, 182, 183) beyond the limit of the Devensian Stockport Formation, both beneath the Ridgacre Formation and beyond its limits of that unit. Currently positively identified only in sections at Quinton and Nechells, where it underlies the temperate (Hoxnian) Quinton Beds. Remnants may be present inside the Devensian limit beneath the Stockport Formation.
Parent Unit: Albion Glacigenic Group (ALBI)
Previous Name(s): Western Drift (-1097)
Lower Glacial Series and Late-Glacial Series (-429)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Nechells. Kelly, 1964; Shotton and Osborne, 1965. 
Type Section  Site investigation boreholes and motorway cutting at Quinton, Birmingham. Horton, 1974, 1989. 
Reference(s):
Kelly, M R. 1964. The Middle Pleistocene of North Birmingham. Philosophical Transactions of the Royal Society of London, Vol.B247, 533-592. 
Horton, A. 1974. The sequence of Pleistocene deposits proved during the construction of the Birmingham motorways. Report of the Institute of Geological Sciences, No.74/22. (London:HMSO). 
Shotton, F W and Osbourne, P J. 1965. The fauna of the Hoxnian interglacial deposits of Nechells, Birmingham. Philosophical Transactions of the Royal Society of London, Vol. B248, 353-378. 
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. 
Old R A, Hamblin, R J O, Ambrose, K, and Warrington G. 1991. Geology of the country around Redditch. Memoir of the British Geological Survey, Sheet 183 (England and Wales). 
Horton, A. 1989. Quinton. 69-76 in Keen, D H (editor), The Pleistocene of the West Midlands. Field Guide. [Cambridge: Quaternary Research Association.] 
Powell, J H, Glover, B W and Waters, C N. 2000. Geology of the Birmingham area. Memoir of British Geological Survey Sheet 168 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E124 E125 E140 E141 E154 E155 E167 E168 E169 E183