| Computer Code: |
LBK |
Preferred Map Code: |
notEntered |
| Status Code: |
Pending Upgrade |
| Age range: |
Marine Isotope Stage 12 (QMIS012)
— Marine Isotope Stage 10 (QMIS010) |
| Lithological Description: |
Greenish grey micaceous silt with sand and clay interbeds. Sulphide-rich wisps and laminae and strong smell of hydrogen sulphide gas common. Shells increasing in abundance towards the base. |
| Definition of Lower Boundary: |
Overlain by the Fishes Formation with planar contact though sometimes eroded by pre-Forth or pre_Coal Pit Formation erosive phases. Basal surface is irregular, filling in an eroded topography. |
| Definition of Upper Boundary: |
Overlain by the Fishes Formation with planar contact though sometimes eroded by pre-Forth or pre-Coal Pit Formation erosive phases. Basal surface is irregular, filling in an eroded topography. |
| Thickness: |
85.5m. Varies from ca 30m. to over 100 metres in deep erosive features. |
| Geographical Limits: |
Not defined. |
| Parent Unit: |
Reaper Glacigenic Group (REAP)
|
| Previous Name(s): |
Lower Channel Deposits [Obsolete Name and Code: Use LBK]
(-2891)
|
| 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 |
