A sedimentological and palynological investigation was carried out on outcropping sedimentary rocks at Dogiyai, Papua, proposed to be named as the Mapia Formation. The age range is from Middle Miocene Pleistocene. lower Formation deposited Metroxylon type Nothofagus emarcida Zone, Early Pliocene. It comprised of three facies associations: tidal channel, point bar, flat deposits. tidally dominat...