Volcanic rock. Aerial photograph of rhyolitic lava and tuff (both grey) in the valley of Kjos, Vatnajokull, Iceland. The Vatnajokull ice-cap feeds sev

---

Volcanic rock. Aerial photograph of rhyolitic lava and tuff (both grey) in the valley of Kjos, Vatnajokull, Iceland. The Vatnajokull ice-cap feeds several outlet glaciers, which are the largest glaciers in Europe. Rhyolitic lava has a blocky surface, which is characterized by smooth- faceted blocks of up to 5 metres in diameter. Tuff consists of compacted small to medium-grained pieces of rock that were fragmented in a volcanic eruption. Such fragments are known as pyroclastic material.

---

Size: 3763px × 3766px
Photo credit: © BERNHARD EDMAIER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: aerial, earth, environment, geography, geology, hill, hills, iceland, icelandic, igneous, kjos, lava, photograph, pyroclastic, rhyolite, rhyolitic, rock, rocks, science, strata, volcanic, volcano, volcanology, vulcanology