Columbia Encyclopedia

(Encyclopedia) Mammoth Cave National Park, 52,830 acres (21,396 hectares), central Kentucky, authorized 1926, est. 1941. Located in a hilly, forested region, it offers numerous outdoor activities. It is the site of ...

(Encyclopedia) Fayetteville fāˈĕtvĭl [key]. 1 City (2020 pop. 93,949), seat of Washington co., NW Ark., ...

(Encyclopedia) azurite ăzhˈərīt [key], blue mineral, the basic carbonate of copper, occurring in monoclinic crystals or masses that range from transparent to translucent and opaque. It is usually associated with...

(Encyclopedia) Colorado–Big Thompson project, constructed by the U.S. Bureau of Reclamation to divert water from the headstreams of the Colorado River to irrigate c.720,000 acres (291,400 hectares) of land in NE C...

(Encyclopedia) damselfish, common name for members of the large family Pomacentridae, marine fishes of tropical waters. Common in the West Indies and along the Florida coasts are the sergeant-major, named for its ve...

(Encyclopedia) cornflower, common herb (Centaurea cyanus) of the family Asteraceae (aster family). It is a garden flower in the United States but a weed in the grainfields of Europe. It is called bluebottle or bluet...

(Encyclopedia) quartzite, usually metamorphic rock composed of firmly cemented quartz grains. Most often it is white, light gray, yellowish, or light brown, but is sometimes colored blue, green, purple, or black by ...

(Encyclopedia) rosemary [ultimately from Lat.,=dew of the sea], widely cultivated evergreen and shrubby perennial (Rosmarinus officinalis) of the family Labiatae (mint family), fairly hardy and native to the Mediter...

(Encyclopedia) herring, common name for members of the large, widely distributed family Clupeidae, comprising many species of marine and freshwater food fishes, including the sardine (Sardinia), the menhaden (Brevoo...

(Encyclopedia) Challenger expedition, British oceanographic expedition under the direction of the Scottish professor Charles Wyville Thompson and the British naturalist Sir John Murray. Taking place from 1872 to 187...