The BGS Lexicon of Named Rock Units — Result Details

Glenga Amphibolite Member

Computer Code: GLAM Preferred Map Code: GAM
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Pale to dark green amphibole schist with local thin lenticles of impure limestone.
Definition of Lower Boundary: Conformable on Dungiven Limestone Formation.
Definition of Upper Boundary: Chloritic greenbeds passing upwards into Dart Formation clastic lithologies.
Thickness: Maximum 700m
Geographical Limits: Glenga and Oughtnager Townlands, County Londonderry, Northern Ireland.
Parent Unit: Dart Formation (DART)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  South end of Butterslope Glen. 
Type Area  Glenga and Stroanbrack Townlands, County Londonderry. 
Partial Type Section  Glenga Burn, 1.3km south-south-east of Butterhope Glen. 
Reference(s):
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used:
N26