Computer Code: |
LPSI |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
Lithological Description: |
Silty clay and clayey silt, thinly laminated, pale olive grey. Some dropstones. Coarsening upwards into ripple cross-laminated sand. |
Definition of Lower Boundary: |
Conformable on Pattack Till Formation. |
Definition of Upper Boundary: |
Unconformable with Ardverikie Till Formation. |
Thickness: |
<10m |
Geographical Limits: |
Catchments of the rivers Pattack and Mashie (at least). |
Parent Unit: |
Central Grampian Glacigenic Subgroup (CGDR)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Partial Type Section |
River cliff section 350m downstream of the confluence of the River Pattack and the Allt Coire nam Plaidean. |
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 the Allt Coire na Ceardaich at its confluence with the River Mashie. |
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
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