The BGS Lexicon of Named Rock Units — Result Details

Drummuir Calcareous Member

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:
S086 S085