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  • Tags: geology

"This district is a primitive formation of quartz and gneiss with blue mountain limestone filled with organic remains on the margin of Lough Erne."

"Ballyshannon. (July 25, 1824.) Soon after leaving Pettigo going towards Lough Derg, the limestone ceases and the mineral productions change entirely..."

“Lough Derg is a lonely sheet of water, extending from north to south, about six miles in length..."