| Computer Code: |
CORG |
Preferred Map Code: |
SYMB |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
| Lithological Description: |
Limestone, bluish-grey, crystalline, commonly thinly banded, with chert lenses. Blocky to flaggy, rarely massive. Tight to isoclinal internal folding common in parts. |
| Definition of Lower Boundary: |
Lower limit of crystalline limestone within pelites and semipelites of Tornahaish Dark Schist and Limestone Formation. |
| Definition of Upper Boundary: |
Upper limit of crystalline limestone within Tornahaish Dark Schist and Limestone Formation. Schistose calcareous semipelite above. Thence non-calcareous semipelite. |
| Thickness: |
12 - 20m. Typically 15m, may be thinner and impure by Allargue House. |
| Geographical Limits: |
On Upper Donside, mainly near Corgarff and Corgarff Castle. Intermittent outcrops extend southeast from Tornahaish to Mammie Hill: also north of Delnadamph. |
| Parent Unit: |
Tornahaish Dark Schist And Limestone Formation (TDSL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Luib Quarry. |
| Reference Section |
Quarry, 310m west of Corgarff Castle. |
| Reference(s): |
| Memoir of the British Geological Survey, Sheet 75, in preparation. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S075
|
