The BGS Lexicon of Named Rock Units — Result Details

Sandend Harbour Limestone Member

Computer Code: SNDL Preferred Map Code: SndL
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Semipelite and pelite, slaty to schistose, partly graphitic, containing beds of metalimestone. In basal part thick folded metalimestone and pyritic graphitic pelite. In upper part, pale grey banded metalimestones and pelite partings.
Definition of Lower Boundary: Sharp change from tremolitic flags of Garron Point Tremolitic Flag Member to interbedded graphitic pelite, metalimestone and semipelite.
Definition of Upper Boundary: Top of highest thick metalimestone bed.
Thickness: c.150m on coast section; not measurable inland.
Geographical Limits: From coast between Garron Point and Sandend village [NJ 5550 6700 - 5575 6665], as far inland as fault at [NJ 535 632], south of which it is covered by Devonian sedimentary rocks.
Parent Unit: Mortlach Graphitic Schist Formation (MOGS)
Previous Name(s): Basal Unit Of Sandend Group (-533)
Sandend Formation [Obsolete Name And Code: See SNDL, TNPL And FORD] (DASG)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  On coast from east side of Garron Point to Sandend village and bay. 
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. 
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 and Gould, D , 1995. British Regional Geology: the Grampian Highlands (4th edition). (London: HMSO for the British Geological Survey), 67-68. 
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