Iceland
Pahoehoe
Colorful scoria, Krafla geothermal area
Viti Crater, Krafla geothermal area
Krafla geothermal plant with tuya (flat-topped volcano erupted beneath glacial ice)
Basalt dike cutting tephra overlain by lava flow, Rekyjanes Peninsula
Geothermal steam, Reykjanes Peninsula
Aldeyarfoss and columnar jointing in basalt
Veidivotn eruptive fissure
Cavernous weathering in basalt, Reykjanes Peninsula
Godafoss
A tuya (flat-topped basaltic volcano erupted under glacial ice)
Cinder cone, Myvatn
Geothermal mud, Krafla
Basalt balls
Another tuya (flat-topped volcano erupted under glacial ice)