Global Volcanism Program | Image GVP-11161
Gedamsa caldera is located along the Main Ethiopian Rift east of Lake Koka (left) and SW of the Wonji Sugar Estate Farm (upper right). The 7 x 9 km wide caldera (also spelled Gadamsa or Gedemsa) is cut by many NNE-SSW-trending regional faults of the Ethiopian Rift. A chain of rhyolitic lava flows and a large 1-km-wide crater occupy the caldera floor. A younger lava dome and flow is found on the SW flank of the volcano (lower left).
NASA Landsat image, 1999 (courtesy of Hawaii Synergy Project, Univ. of Hawaii Institute of Geophysics & Planetology).