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Segovia, city, Spain

(Encyclopedia)Segovia, city (1990 pop. 55,188), capital of Segovia prov., central Spain, in Castile and León, on the Eresma River. It stands on a rocky hill (3,297 ft/1,005 m high) crowned by the cathedral and the...

Silurian period

(Encyclopedia)Silurian period sĭlo͝orˈēən, sī– [key] [from the Silures, ancient tribe of S Wales, where the period was first studied; named by the British geologist R. I. Murchison], third period of the Pal...

Yevpatoriya

(Encyclopedia)Yevpatoriya yĕfpətôˈrēə [key], city (1989 pop. 109,000), E Crimea. From 1954 part of Ukraine (then the Ukrainian SSR), it passed to Russian control in 2014 after the occupation and annexation of...

Zanesville

(Encyclopedia)Zanesville, city (1990 pop. 26,778), seat of Muskingum co., central Ohio, on the Muskingum River at its junction with the Licking River; inc. 1815. It is a trade and industrial center that manufacture...

Carlsbad Caverns National Park

(Encyclopedia)Carlsbad Caverns National Park, 46,766 acres (18,940 hectares), SE N.Mex., in the Guadalupe Mts.; designated a national park in 1930. These connecting limestone caves, with remarkable stalactite and s...

Jura, mountain range, France and Switzerland

(Encyclopedia)Jura jo͝orˈə, Fr. zhüräˈ, Ger. yo͞oˈrä [key], mountain range, part of the Alpine system, E France and NW Switzerland, occupying parts of the French region of Franche-Comté and the Swiss cant...

Nauvoo

(Encyclopedia)Nauvoo nôvo͞oˈ [key], historic city (1990 pop. 1,108), Hancock co., W Ill., on heights overlooking the Mississippi River; inc. 1841. Situated in an agricultural area where fruit, corn, and soybeans...

North Yorkshire

(Encyclopedia)North Yorkshire, county (2011 pop. 598,376), 3,209 sq mi (8,313 sq km), N England. The county comprises the districts of Craven, Hambleton, Harrogate, Richmondshire, Ryedale, Scarborough, and Selby. Y...

Arecibo Observatory

(Encyclopedia)Arecibo Observatory, radio-astronomy facility located near Arecibo, Puerto Rico, part of the National Astronomy and Ionosphere Center. Conceived by, designed by, and built under the supervision of Wil...

calcium oxide

(Encyclopedia)calcium oxide, chemical compound, CaO, a colorless, cubic crystalline or white amorphous substance. It is also called lime, quicklime, or caustic lime, but commercial lime often contains impurities, e...