The BGS Lexicon of Named Rock Units — Result Details

Brent Group

Computer Code: BRNT Preferred Map Code: notEntered
Status Code: Full, pending ratification
Age range: Aalenian Age (JA) — Bathonian Age (JN)
Lithological Description: Sandstones with minor mudstones that have been placed into five formations: Broom Formation Etive Formation Ness Formation Rannoch Formation Tarbert Formation
Definition of Lower Boundary: Defined by the base of the Broom Formation where there is a downward change from sandstones to mudstones (of the Drake Formation).
Definition of Upper Boundary: Defined by the upper boundary of the Tarbert Formation where there is a down-section change from siltstones (Heather Formation) to sandstone.
Thickness: Up to 300 m.
Geographical Limits: East Shetland Basin and into the Viking Graben.
Parent Unit: Not Applicable (-)
Previous Name(s): Brent Formation (-5177)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Bowen, J M. 1975. The Brent Oil-Field. In: Woodland, A W (ed.) Petroleum and the contineental shelf of North-West Europe, 353-361. [Heyden & Son, London] 
Deegan, C E and Scull, B J. 1977. A standard lithostratigraphic nomenclature for the Central and Northern North Sea. Report of the Institute of Geological Sciences, 77/25; NPD Bulletin No.1. 
Richards, P C, Lott, G K, Johnson, H, Knox, R W O'B. and Riding, J B. 1993. 3. Jurassic of the Central and Northern North Sea. In: Knox, R W O'B and Cordey, W G (eds.). Lithostratigraphic nomenclature of the UK North Sea. British Geological Survey, Nottingham. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable