The BGS Lexicon of Named Rock Units — Result Details

Fisher Formation

Computer Code: FIS Preferred Map Code: notEntered
Status Code: Pending Upgrade
Age range: Marine Isotope Stage 10 (QMIS010) — Marine Isotope Stage 6 (QMIS006)
Lithological Description: Very stiff overconsolidated clay, silt and shelly sand. Clay is generally sandy with pebbles of varying origin including chalk.
Definition of Lower Boundary: Basal surface is planar overlying Ling Bank Formation.
Definition of Upper Boundary: Upper surface is irregular, eroded by pre-Forth and Coal Pit Formation erosive phases.
Thickness: 39.5 metres, varies between ca 50 metres and absent where totally eroded.
Geographical Limits: Not defined.
Parent Unit: Reaper Glacigenic Group (REAP)
Previous Name(s): Fisher Beds (-2802)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Stoker, M S, Balson, P S, Long, D, and Tappin, D R. 2011. An overview of the lithostratigraphical framework for the Quaternary deposits on the United Kingdom continental shelf. British Geological Survey Research Report, RR/11/03. 48pp. 
Stoker, M S, Long, D, and Fyfe, J A. 1985. A revised Quaternary stratigraphy for the central North Sea. Report of the British Geological Survey, Vol. 17, No. 2. 
Cameron, T D J, and Holmes, R. 1999. The Continental Shelf. 125-139 in A revised correlation of Quaternary deposits in the British Isles. Bowen, D Q (editor). Special Report of the Geological Society of London, No. 23. 
Holmes, R. 1977. Quaternary deposits of the central North Sea 5. The Quaternary geology of the UK sector of the North Sea between 56° and 58° N. Report of the Institute of Geological Sciences, No. 77/14. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable