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 [Obsolete Name and Code: Use AILL]
(-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
|