The BGS Lexicon of Named Rock Units — Result Details

Linkbrae Limestone Member

Computer Code: LINK Preferred Map Code: Link
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Metalimestone, white to grey, thin-bedded, with thin interbeds of calc-silicate rock.
Definition of Lower Boundary: Not seen in outcrop (blown sand), but observed in Sandend Bay borehole; sharp transition from psammite and semipelite, muscovite-rich, banded pale grey and greenish with some calc-silicate beds.
Definition of Upper Boundary: Not seen (blown sand); probably sharp transition to muscovite-rich semipelite.
Thickness: Over 35m
Geographical Limits: Extends southsouthwest from coast section in Sandend Bay [NJ 558 664] for c.400m. A limestone bed at Cairnton [NJ 544 635] may belong to this unit.
Parent Unit: Tarnash Phyllite And Limestone Formation (TNPL)
Previous Name(s): Middle Part Of Sandend Group (-3525)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Disused, flooded quarry in middle of raised beach, Sandend Bay. 
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