The BGS Lexicon of Named Rock Units — Result Details

Knockmore Limestone Member

Computer Code: KNM Preferred Map Code: KNM
Status Code: Pending Upgrade
Age range: Asbian Substage (CR) — Asbian Substage (CR)
Lithological Description: Unbedded grey micrites arranged as lenticular mounds with bedded cover and off-mound limestones. Limestones of Dartry Formation everywhere comprise dark grey, bedded argillaceous micrites, invariably with bedded blue-black chert (secondary).
Definition of Lower Boundary: (1) Completely enclosed by bedded argillaceous limestones of the Dartry Formation. (2) Occurs at base of formation where it is underlain by limestones of the Glencar Formation. (3) Occurs at top of Dartry Formation where it may be overlain by either Meenymore Formation or sandstones of the Glenade Formation.
Definition of Upper Boundary: See Lower Boundary details.
Thickness: 100 to 130m in type section; 0 to 290m elsewhere.
Geographical Limits: Not yet defined.
Parent Unit: Dartry Limestone Formation (DARL)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
none recorded or not applicable
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable