Global Volcanism Program | Image GVP-06071
An aerial view from the north shows features of the Theistareykjabunga and Krafla volcanic systems. The low-relief Theistareykjabunga volcano, with the Stora-Viti and Litla-Viti summit craters, appears at the lower left. The topographically indistinct Krafla caldera (center) is cut by prominent fissure swarms. The flat, mesa-like areas at the right and other topographically prominent features throughout the photo are table mountains and ridges formed during Pleistocene subglacial eruptions.
Photo by Oddur Sigurdsson, 1977 (Icelandic National Energy Authority).