Complex sentence: At the Khundilani gorge of the Bolān route conglomerate cliffs enclose the valley rising to a height of 800 ft., and at Siri Bolān the passage between the limestone rocks hardly admits of three persons riding abreast.
Split into simpler sentences: At the Khundilani gorge of the Bolān route conglomerate cliffs, which rise to a height of 800 ft., enclose the valley. At Siri Bolān the passage between the limestone rocks hardly admits of three persons riding abreast.