| 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 |
(Lower part of succession). Stream section in Whitehouse Burn. |
| 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. |
| 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
|
