| 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 [Obsolete Name and Code: Use LOGQ]
(-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
|
