| Computer Code: |
ABDN |
Preferred Map Code: |
litho |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
| Lithological Description: |
Interlayered psammite and semipelite, with subsidiary pelite and sporadic minor calcareous horizons. |
| Definition of Lower Boundary: |
Not seen: there is probably a major antiform running through the centre of the area of outcrop. |
| Definition of Upper Boundary: |
Incoming of coarse, gritty psammite in area to north of Oldmeldrum. Elsewhere upper contact is obscured by lateral transition to Ellon Formation. |
| Thickness: |
Several kilometres, but not measureable due to intense folding and migmatisation over most of the outcrop. |
| Geographical Limits: |
Occupies most of Sheet 77 and much of the eastern part of sheet 76E, together with small parts of sheets 86E and 87W. Probable extension into Sheet 67. |
| Parent Unit: |
Argyll Group (ARGY)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
Aberdeen Division
|
| Stratotypes: |
| Type Area |
For Sheet 77: Coast section from south side of Cove Harbour to headland east of Crawpeel Shore. |
| Type Area |
For Sheet 76E: Exposures in stream and beside ruins of Balquhain Castle, and in disused quarry 250m north-north-east of Netherton Smithy. |
| Reference(s): |
| Munro, M, 1986. Geology of the country around Aberdeen. Memoir of the British Geological Survey, Sheet 77 (Scotland). |
| Harris, A L and Pitcher, W S, 1975. The Dalradian Supergroup. "In" Harris, A L, Shackleton, R M, Watson, J, Downie, C, Harland, W B and Moorbath, S. A correlation of the Precambrian rocks in the British Isles. Geological Society Special Report, No.6. p.52-75. Scottish Academic Press, Edinburgh. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S087
S077
S076
S086
S067
S066
|
