The BGS Lexicon of Named Rock Units — Result Details

Pattack Till Formation

Computer Code: PATT Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Gravelly sandy clay diamicton with angular to rounded clasts of micaceous psammite, grey granite, porphyry and quartzite. Pale olive brown and slightly weathered.
Definition of Lower Boundary: Unconformable, on bedrock.
Definition of Upper Boundary: Generally unconformable with the Ardverikie Till Formation, but locally conformable with overlying Linn of Pattack Silt Formation.
Thickness: <4m
Geographical Limits: Valley of the River Pattack.
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 section at the confluence of the Rive Pattack and the Allt Beinn Eilde. 
Type Section  River cliff section 350m downstream of the confluence of the River Pattack and the Allt Coire nam Plaidean. 
Reference Section  River cliff section 250 to 350m upstream of the confluence of the River Pattack and the Allt Coire nam Plaidean. 
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:
S064 S064 S063