The BGS Lexicon of Named Rock Units — Result Details

Westbury Ironstone Member

Computer Code: WI Preferred Map Code: WI
Status Code: Full
Age range: Oxfordian Age (JO) — Oxfordian Age (JO)
Lithological Description: Ironstone and limonitic oolite, yellowish brown, shelly.
Definition of Lower Boundary: Abrupt upward change from limestone of the Clavellata Beds into ferruginous oolite and ironstone.
Definition of Upper Boundary: Fairly rapid upward change from ironstone and ferruginous oolite to smooth grey clay of the Kimmeridge Clay.
Thickness: 0-5m
Geographical Limits: Westbury (mainly) to Steeple Ashton [905 570].
Parent Unit: Sandsfoot Formation (SDT)
Previous Name(s): Westbury Iron Ore (-1276)
Iron Ore Of Westbury (-4977)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Old Westbury Iron Works. 
Reference(s):
Woodward, H B. 1895. the Jurassic Rocks of Britain. The Middle and Upper Oolitic rocks of England (Yorkshire excepted). Vol.5. Memoir or the Geological Survey of the United Kingdom. 
Arbell, W J, 1933. The Jurassic system in Great Britain. Oxford: Oxford University Press. 
Blake, J F and Huddleston, W H 1877. On the Corallian rocks of England. Quarterly Journal of the Geological Society of London, Vol.33, 260-405. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E281