The BGS Lexicon of Named Rock Units — Result Details

Henry's Bridge Member

Computer Code: HBM Preferred Map Code: HBM
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Greenish brown compact chloritic schist with albite porphyroblasts, interbedded semi pelite.
Definition of Lower Boundary: Gradational and conformable with normal clastic Dart Formation lithologies.
Definition of Upper Boundary: Gradational and conformable upwards gradation into normal Dart Formation Lithologies.
Thickness: c.47m
Geographical Limits: Glenelly, Co. Londonderry, Northern Ireland.
Parent Unit: Dart Formation (DART)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  Glensass Burn, 150-200m upstream from Henry's Bridge 
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used: