The BGS Lexicon of Named Rock Units — Result Details

Clashnoir Semipelite Formation

Computer Code: CRSP Preferred Map Code: SYMB
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Semipelite and pelite, grey, weakly banded, graphitic in part.
Definition of Lower Boundary: The top of the Kylnadrochit Semipelite Member, Ailnack Phyllite and Limestone Formation, where strongly layered lithologies with calcareous character pass up into more pelitic lithologies.
Definition of Upper Boundary: The incoming of the first grey limestone at the base of the Inchrory Limestone Formation.
Thickness: c. 330m in type section in Braes of Glenlivet.
Geographical Limits: Braes of Glenlivet.
Parent Unit: Blair Atholl Subgroup (DABA)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Stream section in Allt Vattiern. 
Reference(s):
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable