Global Volcanism Program | Image GVP-04131
Scientists sample fumaroles near the flank vent at Cerro Negro in November 1968. Incandescent spatter is ejected from the vent in the background behind volcanologist Dick Stoiber (left), who led many expeditions from Dartmouth College to Central American volcanoes. This fumarole was a source of tenorite (CuO) and other minerals.
Copyrighted photo courtesy of Dick Stoiber, 1968 (Dartmouth College).