| Computer Code: |
WMCS |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Dimlington Stadial (QDD)
— Windermere Interstadial (QDW) |
| Lithological Description: |
Lacustrine and organic sediments infilling Lake Windermere, comprising upper (Upper Laminated Clay), and lower (Lower Laminated Clay) units of laminated clay separated by a sequence of silt or organic silt (non-organic and organic silt unit). Sporadic rock fragments are present in the organic silt. |
| Definition of Lower Boundary: |
Overlies gravel and till of the Central Cumbria Glacigenic Subgroup (Caledonia Glacigenic Group). |
| Definition of Upper Boundary: |
The Upper Laminated Clay passes conformably upwards into organic muds of the Cumbria-Lancashire Catchments Subgroup (Britannia Catchments Group) of Holocene age. |
| Thickness: |
Cores of up to 6 m have been sampled on the lake floor in water depths of 30 m. Echo sounding in deeper water indicates 21 to 40 m of sediment (Howell, 1971). |
| Geographical Limits: |
Cumbria. |
| Parent Unit: |
Britannia Catchments Group (BCAT)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Cored borehole (5 inch diameter) taken in Low Wray Bay, Lake Windermere, Cumbria. The core represents the type site for the Windermere interstadial of the Late Devensian Stage. Coope and Pennington, 1977; Pennington, 1977, 1978. |
| 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. |
| Thomas, G S P. 1999. Northern England. 91-98 in Bowen, D Q (Editor), A revised correlation of Quaternary and Neogene deposits in the British Isles. Geological Society Special Report No.23. |
| Howell, F T. 1971. A continuous seismic profile survey of Windermere. Geological Journal, Vol.,7, 329-334. |
| Pennington, W. 1977. The late-glacial flora and vegetation of Britain. Philosophical Transactions of the Royal Society of London, Vol.280, Series B, 247-271. |
| Coope, G R and Pennington, W. 1977. The Windermere Interstadial of the Late Devensian. Philosophical Transactions of the Royal Society of London, Vol.280, Series B, 337-339. |
| Pennington, W. 1978. Quaternary Geology. 207-225 in Moseley, F (Editor), The Geology of the Lake District. Yorkshire Geological Society Occasional Publication, No.3. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
