| Computer Code: |
PFS |
Preferred Map Code: |
PFS |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Reddish brown, silty sand with subordinate beds of silt, clay and gravel. Locally dominantly silt and clay. |
| Definition of Lower Boundary: |
Conformable contact with the underlying Chapelknowe Till Member of the Gretna Till Formation or with the Loganhouse Gravel Member of the Plumpe Farm Sand and Gravel Formation. |
| Definition of Upper Boundary: |
Commonly a gradational, glacitectonic contact with the overlying Plumpe Bridge Till Member of the Gretna Till Formation. Otherwise unconformable on bedrock. |
| Thickness: |
15m |
| Geographical Limits: |
Solway Lowlands. |
| Parent Unit: |
Plumpe Sand And Gravel Formation (PLSG)
|
| Previous Name(s): |
Middle Sands and Gravels [Obsolete Name and Code: Use GFSA, SEAG, CGWD, LOGG, PLSG, PFS, EVSI, THBG, EVSG]
(-122)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Section behind cowshed at Plumpe Farm, 1km east of Gretna, Dumfries-shire Geologist's field locality card ME 262-263 |
| Reference(s): |
| McMillan, A A, Merritt, J W, Auton, C A, and Golledge, N R. 2011. The Quaternary geology of the Solway. British Geological Survey Research Report, RR/11/04. 69pp. |
| Trotter, F M, 1922. Report from the Cumberland District. In: Summary of the Progress of the Geological Survey of Great Britain for 1921, 46-48. |
| Trotter, F M and Hollingworth, S E, 1932. The glacial sequence in the North of England. Geological Magazine, Vol.69, 374-380. |
| Trotter, F M. 1929. The glaciation of the Eastern Edenside, the Alston Block, and the Carlisle Plain. Quarterly Journal of the Geological Society of London, Vol.85, 549-612. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
