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Lassen Peak

(Encyclopedia) Lassen Peak: see under Lassen Volcanic National Park.

Campi Flegrei

(Encyclopedia) Campi Flegrei, region and volcanic caldera, Italy: see Phlegraean Fields.

Colorado Plateau

(Encyclopedia) Colorado Plateau, physiographic region of SW North America, c.150,000 sq mi (388,500 sq km), in Arizona, Utah, Colorado, and New Mexico, including the “Four Corners” area. It is…

Deccan

(Encyclopedia) DeccanDeccandĕˈkänˌ [key], region of India. Sometimes defined as all India S of the Narmada River, it is in a more limited sense the plateau of central peninsular India, including…

pyroclastic flow

(Encyclopedia) pyroclastic flow, turbulent, fluidized mixture of rock, volcanic ash, and hot gas that moves like an avalanche away from a volcanic eruption. A pyroclastic flow may contain a mix of…

Aleutian Range

(Encyclopedia) Aleutian Range, volcanic mountain chain, c.1,600 mi (2,600 km) long, SW Alaska, extending W from Anchorage along the Alaska Peninsula, and continuing, partly submerged as the Aleutian…

Punchbowl

(Encyclopedia) Punchbowl, hill, 500 ft (152 m) high, in the city of Honolulu, SE Oahu island, Hawaii. In the bowllike extinct volcanic crater at the summit (reached by a scenic drive) is the National…

Sabalan

(Encyclopedia) Sabalan or SavalanSabalansäˌvəlänˈ [key], volcanic cone, 15,592 ft (4,752 m) high, NW Iran, near Ardebil. The prophet Zoroaster reputedly wrote the Avesta there.

Posillipo

(Encyclopedia) PosillipoPosillipopōzēlˈlēpō [key], volcanic ridge, in Campania, S Italy, projecting into the northern part of the Bay of Naples. The town of Posillipo, a picturesque suburb of Naples…

Ras Dashen

(Encyclopedia) Ras DashenRas Dashenräs dä-shĕnˈ [key], highest peak of Ethiopia, 15,158 ft (4,620 m) high, N Amhara Plateau, E Africa. It is of volcanic origin and has many craters.