| Computer Code: |
GPM |
Preferred Map Code: |
GM |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Diamicton, mainly clast-supported, gravelly, sandy, silty, and matrix-rich gravel. Poorly consolidated, formed of angular to subangular fragments of weathered psammite and porphyry, mainly less than 64mm in diameter with some cobbles and boulders, yellowish brown overall. |
| Definition of Lower Boundary: |
Overlies bedrock or is in unconformable contact on the Ailleag Diamicton Member. |
| Definition of Upper Boundary: |
Generally the ground surface or overlain locally by peat. |
| Thickness: |
To 8m |
| Geographical Limits: |
The deposits occur across the Gaick Plateau in the central Grampian Highlands. |
| Parent Unit: |
Central Grampian Glacigenic Subgroup (CGDR)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
These deposits form a distinct suite of low, recessional moraine ridges, possibly formed annually, typically 2-5m high, that are predominantly composed of comminuted deeply weathered rock. They are closely associated with ice-marginal glacial drainage channels and occur across the Gaick Plateau in the central Grampian Highlands of Scotland. The type locality is the valley of Tarf Water upstream of Falls of Tarf [NN983 797]. Sheet description in preparation. |
| Type Area |
These deposits occur across the Gaick Plateau in central Grampian Highlands. |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S064
|
