Modern sediments around the site include sandy - muds in inland lagoons (composed mainly of peneroplid foraminifera) and on the windward side, a 3.3 yard raised beach 44 - 98 yards wide, of calcareous sand.
Pink Beach — locally called Pantai Merah — has a mixture of white and red sand formed from pieces of foraminifera, a marine protozoan with calcareous shells, and is one of only seven of its kind in the entire world.