Clearlake Oaks cinder cone, Clear Lake Volcanic Field, California
Clearlake Oaks cinder cone, Clear Lake Volcanic Field, CaliforniaCinder cones (or scoria cones) are relatively small, steep-sided volcanoes that are constructed around a single vent when lava is ejected into the air, breaks into smaller pieces, and builds up around the sides of the vent. This photo is looking across the quarry which exposes the interior of a cinder cone east of Clearlake Oaks in the Clear Lake Volcanic Field.