Ключевые слова: basalt, crack, crest, crevice, fault, fissure, geology, iceland, landscape, lava, lava flow, lava run, magma, meadow, national park, nature, plate, ridge, rift, rift valley, rifting, river, rock, stream, tectonic, tectonic plate, thingvellir, tourism, valley, volcanic, volcanic rock, volcano, wood,