Dolomitic conglomerates on the cliff locate at Ban nang kam Donsak district. Dolomitic conglomerates on the cliff, caused by the erosion of rain, wind and sun that make dolomite pebble, at the onset of this conglomerate, sea waves swept grain pebble into the cave, pebble dolomite cemented by calcium carbonate, mud, became dolomitic conglomerates on the cliff.