The lava dome complex of Mount Konocti, Clear Lake Volcanic Field

Roughly a third of the total erupted volume of the Clear Lake volcanic field is represented by the ~ 35 km³ of rocks comprising Mt. Konocti and nearby hills. The mountain itself is over 1200 m (~4000 ft) high and is comprised primarily of a series of dacitic lava domes – Buckingham Peak, Wright Peak, and South Peak, and Howard Peak are all dacites. Dacite is an extrusive igneous rock (erupted onto the Earth’s surface) and contains minerals like feldspar, quartz, and pyroxene. The volcanic domes and flows on and around Mt. Konocti erupted between 600 and 350 ka, with the older volcanic domes and flows confined to the south of the mountain and all domes and flows on Mt. Konocti itself being younger than 500 kyr. This Oblique Google Earth image of Mount Konocti was taken from ~ 10 thousand feet. A few of the dacite domes comprising the mountain are labeled, as are the scarp and deposits of the Black Forest landslide. Figure illustrated by Seth Burgess, USGS.