Computer Code: |
HEBR |
Preferred Map Code: |
notEntered |
Status Code: |
Pending Upgrade |
Age range: |
Marine Isotope Stage 3 (QMIS003)
— Marine Isotope Stage 2 (QMIS002) |
Lithological Description: |
Not drilled, but seismic interpretation suggests it is a boulder clay or diamicton. |
Definition of Lower Boundary: |
Lies on major erosion surface, thought to be related to the Devensian Glacial Maximum. |
Definition of Upper Boundary: |
Overlain by Barra Formation. |
Thickness: |
Generally very thin, less than 15 metres, but very locally up to 50 metres. |
Geographical Limits: |
Not defined. |
Parent Unit: |
Eilean Siar Glacigenic Group (EISR)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
none recorded or not applicable |
Reference(s): |
Fyfe, J A, Long, D and Evans, D, 1993. United Kingdom offshore regional report: the geology of the Malin - Hebrides sea area (London: HMSO for the British Geological Survey). |
Davies, H C, Dobson, M R, and Whittington, R J. 1984. A revised seismic stratigraphy for the Quaternary deposits on the inner continental shelf west of Scotland between 55° 30’ N and 57° 30’ N. Boreas, Vol. 13, 49-66. |
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. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
none recorded or not applicable |