| Computer Code: |
SPEY |
Preferred Map Code: |
SY |
| Status Code: |
Full |
| Age range: |
Anglian Stage (QA)
— Holocene Epoch (QH) |
| Lithological Description: |
Mainly sand and gravel forming river terraces and silty, clayey sand forming floodplains and concealing sand and gravel. Including units of silty sand, silt, clay and peat. |
| Definition of Lower Boundary: |
Sharp, undulating, erosional contact, mainly on yellowish brown tills (diamicton) of the Central Grampian, East Grampian or Banffshire Coast and Caithness Glacigenci subgroups, or on bedrock. |
| Definition of Upper Boundary: |
Ground surface, locally covered by peat, |
| Thickness: |
To 25m |
| Geographical Limits: |
The valley of the River Spey and its tributaries, Grampian Highlands. |
| Parent Unit: |
Grampian Catchments Subgroup (GRCA)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
The valley of the River Spey and its tributaries, Grampian Highlands. McMillan et al. 2004. |
| Reference(s): |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
