Computer Code: |
CLAS |
Preferred Map Code: |
SYMB |
Status Code: |
Full |
Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
Lithological Description: |
Phyllitic semipelite and pelite, represented by andalusite-cordierite schist in part with rare quartzite and psammite. |
Definition of Lower Boundary: |
Above Blackwater Formation at base of highly magnetic biotite-andalusite-schist easily mapped and/or traced by magnetometer between NJ 405 312 and NJ 441 351 (the Garnel Burn Pelite Member). |
Definition of Upper Boundary: |
Boundary with overlying Macduff Formation, where the more semipelitic and pelitic lithologies give way to more psammitic lithologies with grits and conglomerates. Imprecise boundary, probably transgressive. |
Thickness: |
Unknown |
Geographical Limits: |
South eastern corner of Sheet 85E and southern margins of Sheets 86N and 86E north of the Boganclogh and Insch Basic Intrusions. |
Parent Unit: |
Southern Highland Group (SOHI)
|
Previous Name(s): |
Part of Boyndie Bay Group [Obsolete Name and Code: Use CLAS]
(-4544)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
Clashindarroch Forest, Huntly. |
Reference(s): |
Fettes, D J, Lesley, A G, Stephenson, D and Kimbell, S F, 1991. Disruption of Dalradian stratigarphy along the Portsey Lineament from new geological and magnetic surveys. Scottish Journal of Geology, Vol.27, 57-73. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S075
S086
S076
S086
|