Newberry Volcano - Paulina Peak

Newberry Volcano (with Newberry Caldera) is a large potentially active shield volcano located east of the Cascade Range and about southeast of Bend, Oregon, within the Newberry National Volcanic Monument. It is not a typical shield volcano because, in addition to erupting basaltic lavas, it also has erupted andesitic and even rhyolitic lava. The volcano is in diameter and has a total volume of . It possesses a large oval-shaped caldera in diameter, called the Newberry Caldera. Within the caldera there are two lakes (Paulina Lake and East Lake), many pyroclastic cones, lava flows, and obsidian domes. A deep gash in the northern flank, dubbed "The Fissure", is the end of a long series of fractures called the Northwest Rift Zone. Approximately 6,100 years ago, basaltic lava flows erupted from the fissure and covered part of Newberry's northwest flank. Newberry Volcano was named for John Strong Newberry, who explored central Oregon for the Pacific Railroad Surveys in 1855. During the Apollo program, parts of the volcano that resemble the Moon's surface were used to train the astronauts. The Horse Lava Tube System, the Arnold Lava Tube System, and Lava Butte are all on the flanks of the volcano.