What kind of volcanic landform is Amboy Crater near Route 66 in California?

Amboy Crater near Route 66 in California is a volcanic cinder cone.

The crater is a symmetrical volcanic cone in the Mojave Desert, east of the community of Amboy and close to the historic Route 66 corridor. It formed from basaltic lava and scoria erupted during a period of volcanic activity in the region.

A cinder cone develops when fragments of volcanic material accumulate around a vent. Amboy Crater’s shape and dark volcanic rocks contrast sharply with the surrounding desert landscape, making it a prominent natural landmark for travelers on the old highway.

The feature is sometimes called simply a volcano or crater, but those terms are less specific. A caldera is a much larger collapse depression, while a shield volcano has broad, gently sloping sides built mainly by fluid lava. Amboy Crater is classified as a cinder cone because its structure was built primarily from loose pyroclastic fragments around the eruptive vent.