The BGS Lexicon of Named Rock Units — Result Details

Cowhythe Psammite Formation

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
Type Section  Coastal section from east side of Links Bay to Old Hythe. 
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. 
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). 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S096 S086