The BGS Lexicon of Named Rock Units — Result Details

Flugga Sandstone Member

Computer Code: FLUS Preferred Map Code: notEntered
Status Code: Full, pending ratification
Age range: Eocene Epoch (GE) — Eocene Epoch (GE)
Lithological Description: The Flugga Sandstone Member consists of clean, very fine to medium sandstone displaying distinctive 'blocky' log profiles. Thin intercalations of dark grey, fissile mudstone are also present.
Definition of Lower Boundary: The base of the Flugga Sandstone Member is taken at a downward change from sandstone to mudstone, associated with an increase in gamma-ray values and decrease in velocity. Where the Skadan Sandstone Member is present, the two sandstone units are normally separated by the persistent S2a mudstone (refer to Sele Formation).
Definition of Upper Boundary: The top of the Flugga Sandstone Member is taken at a downward change from mudstone to sandstone, associated with a decrease in gamma-ray values and, in some sections, an increase in velocity.
Thickness: Reaches more than 270 m thick in 16/1-1.
Geographical Limits: The Flugga Sandstone Member is restricted to South Viking Graben, largely in the UK sector, but probably extending into Norwegian Block 15/5. It occurs in a north-south belt immediately to the east of the Dornoch Formation.
Parent Unit: Sele Formation (SELE)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  North Sea well 16/7-2: 1720-1875 m (5644-6152 ft) below KB. 
Reference Section  North Sea well 16/8b-2: 2126.5-2178 m (6977-7145 ft). 
Knox, R W O'B and Holloway, S. 1992. 1. Paleogene 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