Over the last half-million years, volcanic eruptions on the Medicine Lake shield volcano have created a rugged landscape dotted with diverse volcanic features. A surreal landscape sculpted by molten earth, Lava Beds National Monument contains volcanic tablelands punctuated by cinder cones, pit craters, and spatter cones, plus more than 700 caves.

Welcome to Lava Beds! This volcano has been active for at least 500,000 years. When the pressure has been relieved, the rest of the lava flows from the base of the cone. St. Helens, are composite volcanoes. McLoughlin and Mt.

Along with historic sites from 1872-73 when Modoc Indians led by Cheif Captain Jack used the lava fields to evade the U.S. Army for five months.

Lava Beds National Monument includes over 46,000 acres, 28,460 of which have been designated as wilderness.

Pahoehoe is smooth and ropy and is the type most common in Lava Beds. Once the eruption ceased, the tube emptied and drained, and a new lava tube cave is left behind. Lava Beds National Monument sits on the north face of the Medicine Lake Shield Volcano. Hawaii Volcanoes National Park. Beyond the mystic beauty that surrounds this place is a bloody and ancient history.

Shasta, Mt. Lava Beds National Monument also protects Native American rock art dating back 2,500 years. When molten lava stopped flowing, hardened tubes were left behind.

Lava Beds National Monument is in the far northeast corner of California, just miles away from the border with Oregon. Cinder cones are typically monogenetic. There are primarily two kinds of basaltic lava flows: pahoehoe and aa. Roughly ninety percent of the lava in the monument is basaltic. The monument is located on a volcanic plateau between northeastern California's Medicine Lake Volcano and Tule Lake National Wildlife Refuge. Lava Beds National Monument is a land of turmoil, both geological and historical. A lava tube is a natural conduit formed by flowing lava from a volcanic vent that moves beneath the hardened surface of a lava flow. Lava Beds National Monument sits on the northeast corner of the Medicine Lake Volcano, a little-known mountain in the Cascade Range. Most of the more famous Cascade volcanoes, such as Mt. Close-up of a skylight on a coastal plain, with lava stalactites forming on the roof of the tube. Tucked away amidst the sagebrush, half-hidden underground, is the Lava Beds National Monument in northern California.

There are two types of volcanoes in the Cascades.

These strange features were formed when the outer edges of flowing lava began to cool, forming tubes. Lavacicles on the ceiling of Mushpot Cave in Lava Beds National Monument. The lava tube caves found here were created by flows of smooth lava 10,500 to 65,000 years ago.

Boundless plains of grasslands, basalt boulder fields, volcanoes, and the densest concentration of lava tubes in North America (over 700 caves) make this a special place.

Aa is formed when pahoehoe cools and loses some of its gases.

As the lava flowed it began to cool and solidify on the top and sides.

The lava cools as it falls, forming cinders that pile up around the vent.