The island is about 6 km long by 4 km wide with a maximum height of 300 m. It is formed of peridotites and has a rugged terrain with steep slopes and rocky coasts. The eastern and northern coast has steep cliffs and small sandy bays located at valley outlets. The west coast has gentler topography with a fringing reef enclosing a lagoon with coastal mangroves. Much of the island is covered with scrub vegetation, but there are areas of dry forest and niaouli.[1]