Lava and ash floes in the Galapagos Islands Archipelago, UNESCO World Heritage Site, Ecuador, South America

galapagos islands volcanic activity lava flow hardened surface ecuador south america nature geology eruption landscape tropical islands ecological diversity lava texture volcanic landscape natural patterns biodiversity geothermal features environmental science earth science geological formations ecological tourism lava formations volcanic eruptions rock formations coastal geology crater magma natural history ecological systems wildlife humid tropics risk assessment natural phenomenon black lava island ecosystems volcanic rock eruption impacts environmental change geological hazards conservation efforts ecological importance remote islands vibrant landscapes natural heritage unique ecosystems geological heritage climate influence ancient landscapes ecological significance lava beds