‘The Coal-measure hills that form the outer margin of the Castlecomer table-land are generally covered with local drift; but the drift on nearly all the other Coal-measure hills is largely composed of limestone, even on the top of hills 700 feet high. What is most remarkable, however, is that in some places there are valleys and plains not more than 400 feet above the sea without a particle of limestone-drift on them, while hills in their vicinity are covered with it’.

In sinking the various pits in the Queen's County Collieries, a Stratified Drift was found under some of this Boulder-clay. When the place was visited, none of these sections could be examined; but fortunately a record of each was kept in the ‘bore-books’ that are in the possession of the different agents and proprietors.