Geologic Formations
Lava Beds National Monument is geologically outstanding because of its great variety of "textbook" volcanic formations including: lava tube caves; fumaroles; cinder cones; spatter cones; pit craters; hornitos; maars; and lava flows and volcanic fields
Volcanic eruptions on the Medicine Lake Shield volcano have created an incredibly rugged landscape punctuated by these many landforms of volcanism.
Read more about this topic: Lava Beds National Monument