The BGS Lexicon of Named Rock Units — Result Details

Logie Head Quartzite Member

Computer Code: LOGQ Preferred Map Code: LogQ
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Quartzite, flaggy, thin- to thick-bedded, with thin partings of micaceous psammite. Minor semipelite in upper part, in part with calc-silicate lenses.
Definition of Lower Boundary: Fairly sharp change from very thickly-bedded quartzite of Findochty Quartzite Member.
Definition of Upper Boundary: Rapid transition to semipelite with thin psammitic ribs of Dicky Hare Member.
Thickness: c.1200m on coast section; cannot be distinguished separately inland.
Geographical Limits: Along coast section from Toshie's Long Craigs [NJ 4970 6835] to the east side of Logie Head [NJ 5310 6810]; cannot be differentiated inland.
Parent Unit: Cullen Quartzite Formation (CUQU)
Previous Name(s): Logie Head Sub-Group (-4167)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  On coast from Toshie's Long Craigs (west side of Cullen Bay) to northeast corner of Logie Head. 
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