mountain range, extending across the border between southwestern County Tipperary and southeastern County Limerick, southern Ireland. The range has the east–west trend characteristic of the extreme south of the country. The highest peaks are formed of sandstone, the highest point being Galtymore (3,018 feet 【920 m】). The mountains bear strong evidence of glaciation, notably in the form of corries (ice-scooped basins) with lakes and block moraines (mounds of glacial debris impeding drainage).