| Computer Code: |
LBAG |
Preferred Map Code: |
LBA |
| Status Code: |
Full |
| Age range: |
Mid Pleistocene (QPM)
— Mid Pleistocene (QPM) |
| Lithological Description: |
Suite of glacial, glaciofluvial and glaciolacustrine deposits that contain clasts derived predominantly from offshore of the Aberdeenshire coast (calcareous siltstone, limestone, red sandstone, shell fragments), including clayey diamictons (till), sand, gravel, silt and clay. Deposited from ice that pushed onshore from the North Sea Basin. |
| Definition of Lower Boundary: |
Sharp, unconformable contact with bedrock. |
| Definition of Upper Boundary: |
Unconformable contact with units of the Logie-Buchan and East Grampian Glacigenic subgroups. |
| Thickness: |
Up to 10 m. |
| Geographical Limits: |
Coastal lowland north of Montrose, east of Ellon and south of Peterhead. |
| Parent Unit: |
Albion Glacigenic Group (ALBI)
|
| Previous Name(s): |
Red Series [Obsolete Name and Code: Use MDR, LBD, MEAG, LBAG]
(-1013)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Slains, northeast of Aberdeen (Merritt et al., 2003). See also the stratotypes of constituent formations, including Benholm Clay and Auchleuchries Sand and Gravel. |
| Reference(s): |
| McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. |
| McMillan, A A, Hamblin, R J O and Merritt, J W. 2005. An overview of the lithostratigraphical framework for the Quarternary and Neogene deposits of Great Britain (onshore). British Geological Survey Research Report RR/04/04. |
| Merritt, J W, Auton, C A, Connell, E R, Hall, A M and Peacock, J D. 2003. The Cainozoic geology and landscape evolution of north-east Scotland. Memoir of the British Geological Survey, Sheets 66E, 67, 76E, 77, 86E, 87W, 87E, 95, 96W, 96E and 97 (Scotland) |
| Hall, A M and Connell, E R. 1991. The glacial deposits of Buchan, northeast Scotland. 129-136 in Ehlers, J, Gibbard, P L and Rose, J (editors), Glacial Deposits in Great Britain and Ireland. (Rotterdam: Balkema.) |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
