The BGS Lexicon of Named Rock Units — Result Details

Ailleag Diamicton Formation

Computer Code: AILL Preferred Map Code: AIL
Status Code: Full
Age range: Anglian Stage (QA) — Wolstonian Stage (QO)
Lithological Description: Compact, very poorly sorted, clast-supported, matrix-rich diamicton formed of angular fragments of weathered psammite (locally granite or porphyry) to boulder size in a yellow-brown or orange, commonly ferruginous, matrix of silty sand.
Definition of Lower Boundary: Unconformable on bedrock.
Definition of Upper Boundary: Sharp, unconformable, or gradational glacitectonic contact with Ardverikie Till Formation.
Thickness: 5m
Geographical Limits: Central Grampian Mountains of Scotland.
Parent Unit: Central Grampian (Albion) Glacigenic Subgroup (CGAG)
Previous Name(s): Ailleag Diamicton Member (-2561)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  River cliff of the Feith Ghorm Ailleag, Gaick Plateau, exposing the full thickness of the unit. 
Partial Type Section  River cliff of the Feith Ghorm Ailleag, exposing the upper contact and overlying unit. 
Reference(s):
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S063