The BGS Lexicon of Named Rock Units — Result Details

Suie Hill Formation

Computer Code: SUH Preferred Map Code: litho
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Dominantly semipelite, muscovite-rich, typically with andalusite, but with mappable units of poorly-sorted, gritty psammite becoming dominant towards the top; also contains a mappable unit of strongly magnetic pelite.
Definition of Lower Boundary: Transition from mixed psammite, semipelite and pelite without gritty units to more uniform semipelite with gritty units: overlies Craigievar Formation (right way up).
Definition of Upper Boundary: Not seen: cut off by Insch and Boganclogh intrusions.
Thickness: Maximum of c.4000m to the east of the Rhynie Devonian outlier, but only 800-1000m west of the outlier.
Geographical Limits: (i) Western: Bounded to north by Boganclogh Intrusion, to east by Rhynie Devonian outlier and to west and south by Craigievar Formation. (ii) Central: Bounded to north by Insch Intrusion, to west by Rhynie outlier, to south by Craigievar Formation, and to east by Bennachie Granite. (iii) Eastern: Small area near Hillbrae (NJ 684 246), bounded to northwest by a ductile shear zone at the margin of the Insch Intrusion, to east by a continuation of fault marking the eastern boundary of the Bennachie Granite and to south by the Bennachie Granite. (iv) Kist Hill: Small area around NJ 6415 bounded to east and west by faults, to south by the Tillyfourie Tonalite and to north by the Bennachie Granite.
Parent Unit: Southern Highland Group (SOHI)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  (Upper part of formation). From forestry gate at top of Suie Hill (Tullynessle to Clatt) road, follow partly exposed stream section to confluence with Casaiche Burn. 
Partial Type Section  (Lower part of succession). Stream section in Whitehouse Burn. 
Reference(s):
Gould, D. 1997. Geology of the area around Alford and Inverurie. Memoir of the British Geological Survey, Sheets 76E and 76W (Scotland). 
Wilson, J S G. 1890. Explanation of Sheet 76 Central Aberdeenshire. Memoir of the Geological Survey (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S075 S076 S076