| Computer Code: |
DRUC |
Preferred Map Code: |
SYMB |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
| Lithological Description: |
Semipelite and psammite, schistose to phyllitic with many thin beds of calc-silicate rock and metalimestone. |
| Definition of Lower Boundary: |
Lowest bed of thin limestone (where present) in upper part of Pitlurg Calcareous Flag Formation. Background lithology changes from banded calcareous psammite and semipelite to less obviously calcareous semipelite with some psammite. |
| Definition of Upper Boundary: |
Base of graphitic pelites with beds of limestone comprising the Mortlach Graphitic Schist Formation. |
| Thickness: |
up to 250m. |
| Geographical Limits: |
Keith area, Towie to Little Ardrone. |
| Parent Unit: |
Pitlurg Calcareous Flag Formation (PCFL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Lowrie Burn, 150 to 350m upstream from confluence with R. Isla. |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S085
S086
|
