| Computer Code: |
WHSG |
Preferred Map Code: |
WhsG |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
| Lithological Description: |
Coarse-grained psammites, commonly gritty, and quartzites, with subsidiary semipelite and pelite; gritty units and semipelites in part calcareous. |
| Definition of Lower Boundary: |
Local unconformity at incoming of first major psammite bed above thin-bedded calcareous semipelites of Boyne Limestone Formation. |
| Definition of Upper Boundary: |
Transition from partly calcareous semipelite and psammite to non-calcareous lithologies at top of Whitehills Grit Formation; commonly marked by change to graded coarse gritty psammite and semipelite. |
| Thickness: |
Probably c.1km, but coast section includes considerable repetition by folding. |
| Geographical Limits: |
From Moray Firth coast [NJ 655 652-NJ 789 635] southwards to northern margin of Insch intrusion [NJ 650 325 to NJ 725 305]. |
| Parent Unit: |
Southern Highland Group (SOHI)
|
| Previous Name(s): |
Upper Part Of Whitehills Grit
(-609)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Coastal section from Whyntie Head to Craig Neen, Whitehills. |
| Reference(s): |
| Stephenson, D, et al. 1993. Stratigraphy and correlation of the Dalradian rocks of the East Grampian Project area. British Geological Survey Technical Report WA/93/91. |
| Stephenson, D and Gould, D. 1995. British Regional Geology: the Grampian Highlands (4th edition). (London: HMSO for the British Geological Survey), 67-68. |
| Harris, A L, Haselock, P J, Kennedy, M J and Mendum, J R, 1994. The Dalradian Supergroup in Scotland, Shetland and Ireland. 33-53 in Gibbons, W E and Harris, A L (editors). A revised correlation of Precambrian rocks in the British Isles. Special Report of the Geological Society, London, No.22. |
| Read, H H, 1923. Geology of the country around Banff, Huntly and Turriff, Lower Banffshire and north-west Aberdeenshire. Memoir of the Geological Survey, Scotland Sheets 86 and 96 (Scotland). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S096
S096
S086
S086
|
