mafate volcanic caldera in the island of réunion

basalt biodiverse biodiversity caldera cirque cliffs cloud cone crater degradation department des ecoregion endemic environmental erosion evergreen forests geologic heritage high hiking igneous indian island landscape logging mafate mascarene mineral moist montane mountains national native neiges ocean overseas parc park peaks piton primary protection relict remote richness rauml union racopy slope species steep subtropical summit trekking tropical volcanic volcano world