Global Volcanism Program | Image GVP-11512
Pyroclastic cones dot the surface of the Kookooligit Mountains in north-central St. Lawrence Island in the Bering Sea. Kookooligit is a 30 x 40 km wide, 673-m-high shield volcano of Pleistocene-to-Holocene age overlain by more than 100 small cinder cones, most of which are aligned E-W along the crest of the elongated shield volcano. The cones were the source of dominantly alkali basaltic and basanitic lavas flows.
Photo by Bob Webster.