Global Volcanism Program | Image GVP-06046
Fresh black lava flows from the 1984 eruption of Krafla drape the Gjastikki fault, whose escarpment forms the brownish cliff surfaces. Note the geologist at the upper right for scale. The still-steaming lava flow, photographed here on September 7, is only days old and partially buries the fault, which was produced during a previous rifting episode.
Photo by Michael Ryan, 1984 (U.S. Geological Survey).