Also visible in blue is the distribution of debris generated during the last ice age, which shows that Mauna Kea has not been active for several thousand years. North is at the top. Hawaii The December 1974 lava flow erupted from a series of en echelon fissures close to the summit of Kilauea Caldera. Fissures of comparable dimensions may also have been the vents for the flows on the flanks of Sif Mons, Venus. Volcano A cinder cone is a steep, conical hill of volcanic fragments that accumulate around and downwind from a vent.
Cinder cones range in size from tens to hundreds of meters tall.
The cone is 95 meters in height with a crater diameter of 400 meters at the top. Hualalai Volcano is in the background. Bullard, Fred M. Volcanoes . Press, Frank and Raymond Siever. W. H. Freeman and Company, New York, 4th edition, 1986.