The BGS Lexicon of Named Rock Units — Result Details

Ederny Limestone Member

Computer Code: EDNY Preferred Map Code: EDNY
Status Code: Full
Age range: Arundian Substage (CJ) — Arundian Substage (CJ)
Lithological Description: Limestone, pale grey, micritised, sparsely bioclastic crinoidal packstone with wisps and disrupted layers of yellow silty shale.
Definition of Lower Boundary: Either gradational, with normal limestones of the formation (ie downward decrease in micritisation) or abrupt, with base marked by 0.06 - 0.2m layer of grey shales and noduler limestones; also rests on Drumowen Sandstone and Crockanaver Limestone members.
Definition of Upper Boundary: Pitted top of the member overlain by up to 0.18 metres of multi coloured clays representing disconformable base of succeeding Bundoran Shale Formation.
Thickness: 2.5 - 5.5m
Geographical Limits: Kesh-Omagh area of the northwest Carboniferous basin of Ireland.
Parent Unit: Ballyshannon Limestone Formation (BAL)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Area  At the top of south faces of working and disused quarries, and forming the southward inclined dip slope (south-face) of Carn Ridge, south and southeast of Ederny, County Fermanagh. 
Type Section  In north west corner of Magheraculmoney (Ederny) Quarry (disused), 4.4m of micritised limestone overlie 0.06 - 0.2m of calcareous shales below base of Bundoran Shale Formation. 
Mitchell, W I, Johnston, T P and Legg, I C. 2004. Geology of the country around Kesh, Co. Fermanagh and Omagh, Co. Tyrone. Geological Sheets 32 and part of 31 (Kesh) and 33 (Omagh). Geological Survey of Northern Ireland. Technical Report GSNI 04/1. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: