batu na apga'batu na apgaʔid. ofbatun.phr.sandstoneThese kind of rocks are like sandstone. They are found in the mountain ridges of Mt. Tandawanan. Some are round and peel off in contoured layers, others are flat and irregularly shaped. People use apga' to scrub their bodies when they bathe when no soap is available, and they use it to clean the soot off of cooking kettles and pots.1.2.2.2Rock