| Computer Code: |
CWPS |
Preferred Map Code: |
CwPs |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
| Lithological Description: |
Psammite and semipelite, interbedded, thinly-banded, gneissose in part. Calcareous near base (dominantly calc-silicate beds). Also contains limestone unit in lower part (Rosehall Croft Limestone) and beds of calcareous semipelite near top. Locally migmatitic with quartz and leucotonalite veining. |
| Definition of Lower Boundary: |
Not seen at type section due to Portsoy Shear Zone. |
| Definition of Upper Boundary: |
Lowest (white) limestone on western side of Old Hythe Bay. |
| Thickness: |
Probably 800m in coast section; may reach 1.5km around Cornhill. |
| Geographical Limits: |
From Moray Firth coast [NJ 592 661 - NJ 609 664] southwards to 4km east of Huntly [NJ 570 406]. |
| Parent Unit: |
Crinan Subgroup (DBCN)
|
| Previous Name(s): |
Cowhythe Gneiss [Obsolete Name And Code: See CWPS]
(DBCH)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Coastal section from east side of Links Bay to Old Hythe. |
| Reference(s): |
| 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. |
| Stephenson, D and Gould, D. 1995. British Regional Geology: the Grampian Highlands (4th edition). (London: HMSO for the British Geological Survey), 67-68. |
| 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). |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S096
S086
|
