| Computer Code: |
ARDT |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Stony sandy clay diamicton with angular to subrounded clasts up to boulder size; a typical lodgement till. Locally overlying a unit of deformation till derived from the destruction of underlying Linn of Pattack Silt Formation. |
| Definition of Lower Boundary: |
Unconformable on (1) Linn of Pattack Silt Formation, or (2) Pattack Till Formation, or (3) bedrock. |
| Definition of Upper Boundary: |
Conformable with units of outwash sand and gravel, morainic deposits or peat, etc. |
| Thickness: |
<12m |
| Geographical Limits: |
Whole of Sheet 63E and beyond. |
| Parent Unit: |
Central Grampian Glacigenic Subgroup (CGDR)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
River cliff of the Allt Coire na Ceardaich at its confluence with the River Mashie. |
| Partial Type Section |
River cliff section 250 to 350m upstream of the confluence of the River Pattack and the Allt Coire nam Plaidean. |
| Partial Type Section |
River cliff of River Pattack at its confluence with the Allt Beinn Eilde. |
| Reference(s): |
| Merritt, J W, 1999. The Quaternary geology of the Dalwhinnie District. British Geological Survey Technical Report WA/99/14R. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S063
S064
S064
|
