OR/14/008 Lithostratigraphical units used by BGS

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Aldiss, D T. 2014. The stratigraphical framework for the Palaeogene successions of the London Basin, UK. Nottingham, UK, British geological Survey. (OR/14/008)

These lists are in alphabetical order of unit names.


'Lexicon' Code 'Name 'of unit
BRB Bracklesham Group
LMBE Lambeth Group
MONT Montrose Group
THAM Thames Group


'Lexicon' Code 'Name 'of unit Parent Unit
BGS Bagshot Formation Bracklesham Group
CMBS Camberley Sand Formation Bracklesham Group
HWH Harwich Formation Thames Group
LIST Lista Formation Montrose Group
LC London Clay Formation Thames Group
RB Reading Formation Lambeth Group
TAB Thanet Formation Montrose Group
UPR Upnor Formation Lambeth Group
WIDS Windlesham Formation Bracklesham Group
WL Woolwich Formation Lambeth Group


Names in italic script are of informal units of member status.

'Lexicon' Code 'Name 'of unit Parent Unit
AVLY Aveley Member London Clay Formation
BSBD Base Bed Member Thanet Formation
BLB Blackheath Member Harwich Formation
CLGB Claygate Member London Clay Formation
KNTS Kentish Sands Member Thanet Formation
LBED Laminated' Beds Woolwich Formation
LMCL Lower' Mottled Clay Reading Formation
LSCL Lower' Shelly Clay Woolwich Formation
OCKD Ockendon Member London Clay Formation
OH Oldhaven Member Harwich Formation
OC Ormesby Clay Member Lista Formation
ORW Orwell Member Harwich Formation
PGWS Pegwell Silt Member Thanet Formation
RCLV Reculver Sand Member Thanet Formation
SHEP Sheppey Member London Clay Formation
SHOM Shorne Member Woolwich Formation
STMH Stourmouth Silt Member Thanet Formation
SLOM Striped' Loams Woolwich Formation
SWCB Swanscombe Member Harwich Formation
SWCL Swinley Clay Member Bagshot Formation
UMCL Upper' Mottled Clay Reading Formation
UPSCL Upper' Shelly Clay Woolwich Formation
WAM Walton Member London Clay Formation
WLWS Woolwich' Sands Woolwich Formation
WRAB Wrabness Member Harwich Formation


'Lexicon' Code 'Name 'of unit Parent Unit
BGP Bagshot Pebble Bed Bagshot Formation
BLHB Bullhead Bed Base Bed Member
CEGB Cliffs End Greensand Bed Base Bed Member
COBL Cobham Lignite Bed Shorne Member
HARS Harwich Stone Band Wrabness Member
LNSH Lessness Shell Bed Blackheath Member
SAHP St Ann's Hill Pebble Bed Bagshot Formation
STHP Stanners Hill Pebble Bed Windlesham Formation
SUFP Suffolk Pebble Bed Orwell Member