The stratigraphy and structure of the carboniferous rocks of the Omagh syncline / Стратиграфия и строение каменноугольных пород Омагской синклинали

The area to he described consists of two irregularly elongate outcrops of Lower Carboniferous sedimentary rocks in the counties of Tyrone, Fermanagh, and Donegal; the larger southern outcrop, covering 148 square miles, extends from Lough Erne in the west to the Strule Valley in the east; the northern outcrop, about 30 square miles in extent, lies about six miles north of the southern outcrop.
The Carboniferous strata rest unconformably on an eroded and irregular surface of metamorphic rocks of Dalradian and Moinian age, which structurally are a south-western extension of the Caledonide mountain ranges of the Central Scottish Highlands. In places, the boundary between the Carboniferous outcrop and the metamorphic rocks is determined by faults. The outcrops may therefore be considered as outliers — in part faulted and in part erosional. They are the remnants of a once more widespread covering of Carboniferous strata. <...>