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.

This image is made available under the Creative Commons BY-NC 4.0 license terms.

Kookooligit Mountains