| Computer Code: |
CISA |
Preferred Map Code: |
CISF |
| Status Code: |
Full |
| Age range: |
Ediacaran Period (AD)
— Comley Series (EC) |
| Lithological Description: |
Metasandstone, arenite to quartz-arenite, grey to buff-grey, locally gritty. |
| Definition of Lower Boundary: |
Outgoing of dominantly semipelite or pelitic slaty lithologies or the outgoing of variable green to rusty weathering arenites, wackes and semipelites; incoming of cleaner, coarse-grained quartzose arenites. |
| Definition of Upper Boundary: |
Incoming of variable arenite, wacke and semipelitic lithologies, and more matrix-rich rocks in general. |
| Thickness: |
1300m maximum (estimated, but considered to lens out laterally) |
| Geographical Limits: |
Currently only defined within Sheet 38e (aberfoyle), where it occurs locally on either side of the Aberfoyle Slate and the Loch Katrine Volcaniclastic Formation in synformal folds; similar lithology known from Ben Lomond. |
| Parent Unit: |
Southern Highland Group (SOHI)
|
| Previous Name(s): |
Ben Ledi Grits
(-652)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Open upland ground between Creag Innich and the Duke's Pass, northwest of Aberfoyle. |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S038
|
