10aa7780_s____Philippine_Turtle_Islands__Terrain
[Island] Boan [Terrain_2] Sandstone, mud and coralline sand Accretion of coralline rubble at the northeastern part, where the mangroves are. Beach erosion at the southern part . Diapiric extrusion dormant [Groundwater Availability] Shallow groundwater available in the sandy flatlands [Terrain] 
Flatland with low undulating hills at the northern part
Ocean Ambassadors -- Philippine Turtle Islands
Terrain