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):
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. 
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). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S096