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Huron, Lake

(Encyclopedia)Huron, Lake hyo͝orˈänˌ [key], 23,010 sq mi (59,596 sq km), 206 mi (332 km) long and 183 mi (295 km) at its greatest width, between Ont., Canada, and Mich.; second largest of the Great Lakes. It ha...

cave

(Encyclopedia)cave, a cavity in the earth's surface usually large enough for a person to enter. Caves may be formed by the chemical and mechanical action of a stream upon soluble or soft rock, of rainwater seeping ...

Nagorno-Karabakh

(Encyclopedia)Nagorno-Karabakh nəgôrˈnə-kərəbäkh [key], region (1990 pop. 192,000), 1,699 sq mi (4,400 sq km), SE Azerbaijan, between the Caucasus and the Karabakh range. Khankendi or Stepanakert (the capita...

Devonian period

(Encyclopedia)Devonian period dĭvōˈnēən [key], fourth period of the Paleozoic era of geologic time between 408 and 360 million years ago (see Geologic Timescale, tablegeologic timescale, table). It was named (...

Columbia, cities, United States

(Encyclopedia)Columbia kəlŭmˈbēə [key]. 1 City (2020 pop. 104,681), Howard co., central Md., between W...

Udmurt Republic

(Encyclopedia)Udmurt Republic o͝odˈmo͝ort, Rus. o͝odmo͞ortˈ [key] or Udmurtia, constituent republic (1990 pop. 1,620,000), 16,255 sq mi (42,100 sq km), European Russia, in the forested foothills of the Urals,...

Sinai

(Encyclopedia)Sinai sīˈnī [key], triangular peninsula, c.23,000 sq mi (59,570 sq km), NE Egypt. It is c.230 mi (370 km) long and 150 mi (240 km) wide and extends north into a broad isthmus linking Africa and Asi...

Tatarstan

(Encyclopedia)Tatarstan tətärˈēə [key], republic (1990 est. pop. 3,660,000), 26,255 sq mi (68,000 sq km), E European Russia, in the middle Volga and lower Kama river valleys. Kazan is the capital; other import...

spring, in geology

(Encyclopedia)spring, in geology, natural flow of water from the ground or from rocks, representing an outlet for the water that has accumulated in permeable rock strata underground. Some of the water that falls as...

Yunnan

(Encyclopedia)Yunnan or Yun-nan both: yünˈnän [key] [south of the clouds], province (2010 pop. 45,966,239), c.162,000 sq mi (419,600 sq km), SW China. It borders Myanmar on the west and Laos and Vietnam on the s...