Dolangon Island Wildlife Reserve with an average slope of land <2 meters and relief <2 meters. Dolangon Island Wildlife Reserve has a geological formation of PRT (Pulau Rotan) with an area of ​​462.5 Ha consisting of rocks and coral islands (b53). The dominant type of rock or mineral is a rock with a slightly rough / rocky texture (land system map / land suitability). The geological formation is a coastal formation derived from marine sediment.
Types of land that exist in Dolangon Island Wildlife Reserve is Alluvial especially in Mangrove forest area which is always inundated by sea water. In other parts of the soil type is dominated by Podsolik and Pasir. Podsolic soil types are dominated by low-grade Quarta materials, well drained and store water for a long time. Podsolik also called spodsol usually consists mostly of sand deposits with dark gray color on the top layer, the lower layer (Horizon B) is darker gray again.
Reptile: green turtle (Chelonia mydas) and hawksbill (Eretmochelys imbricata), monitor lizard (Varanus salvator), gecko (Gecko gecko), chameleon (Calotes cristatellus).