The volcano rises to above sea level and is capped by a wide caldera. Mount Morning has been defined as a large shield volcano that consists of a central volcano overlying an older volcanic complex. Fissure vents have produced at least 185 parasitic vents on the slopes of Mount Morning. They are cinder cones, fissure ridges, lava domes and volcanic necks, and their diameters range from a few metres to a few hundred metres. Many of the vents form alignments, some cone craters overlap or the vents themselves have linear shapes. These linear patterns defne northeast-southwest trends, with a minor northwest-southeast alignment. Lava flows emanate from cones and make up the present-day surface of the volcano.