Columbia Encyclopedia
Search results
82 results found
lava
(Encyclopedia)lava läˈvə [key], molten rock that erupts on the earth's surface, either on land or under the ocean, by a volcano or through a fissure. It solidifies into igneous rock that is also called lava. Bef...Lava Beds National Monument
(Encyclopedia)Lava Beds National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...aa, type of lava
(Encyclopedia)aa äˈä [key]: see lava. ...pahoehoe
(Encyclopedia)pahoehoe: see lava.magma
(Encyclopedia)magma măgˈmə [key]: see lava. ...Kilauea
(Encyclopedia)Kilauea kēˈläwāˈə [key], volcano and caldera, 3,646 ft (1,111 m) deep, central Hawaii island, Hawaii, on the southeastern slope of Mauna Loa in Hawaii Volcanoes National Park. One of the largest...pumice
(Encyclopedia)pumice pŭmˈĭs [key], volcanic glass formed by the solidification of lava that is permeated with gas bubbles. Usually found at the surface of a lava flow, it is colorless or light gray and has the g...Hawran
(Encyclopedia)Hawran or Hauran houränˈ [key] [Heb.,=hollow or cavernous land], region, SW Syria. It is a largely treeless area marked by conical volcanic peaks, barren lava fields, and rich lava soil. In the nort...Nyamuragira
(Encyclopedia)Nyamuragira or Nyamulagira, active volcano (11,033 ft/3,058 m), S Virunga range, in E Congo (Kinshasa) near the Rwanda border, N of Lake Kivu and 15 mi (25 km) N of Goma, in S Virunga National Park. A...obsidian
(Encyclopedia)obsidian ŏbsĭdˈēən [key], a volcanic glass, homogeneous in texture and having a low water content, with a vitreous luster and a conchoidal fracture. The color is commonly black, but may be some s...Browse by Subject
- Earth and the Environment +-
- History +-
- Literature and the Arts +-
- Medicine +-
- People +-
- Philosophy and Religion +-
- Places +-
- Africa
- Asia
- Australia and Oceania
- Britain, Ireland, France, and the Low Countries
- Commonwealth of Independent States and the Baltic Nations
- Germany, Scandinavia, and Central Europe
- Latin America and the Caribbean
- Oceans, Continents, and Polar Regions
- Spain, Portugal, Italy, Greece, and the Balkans
- United States, Canada, and Greenland
- Plants and Animals +-
- Science and Technology +-
- Social Sciences and the Law +-
- Sports and Everyday Life +-
