Glacial deposits of gravel exist in a band stretching from the Offaly border at Edenderry, to the sea at Laytown. This is the basis of a long quarrying tradition. The local availability of large deposits of the limestone and shale also gave rise to a significant cement production industry within the county. The two largest cement facilities are at Kinnegad and Platin, the latter of which is owned by Irish Cement and has the capacity to produce 2.8 million tonnes of cement per annum, which is primarily transported via rail to Dublin for use or export.