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Canadian Shield

(Encyclopedia)Canadian Shield or Laurentian Plateau lôrĕnˈchən [key], U-shaped region of ancient rock, the nucleus of North America, stretching N from the Great Lakes to the Arctic Ocean. Covering more than hal...

Saint Lawrence Seaway

(Encyclopedia)Saint Lawrence Seaway, international waterway, 2,342 mi (3,769 km) long, consisting of a system of canals, dams, and locks in the St. Lawrence River and connecting channels between the Great Lakes; op...

Winter Haven

(Encyclopedia)Winter Haven, resort city (1990 pop. 24,725), Polk co., central Fla; settled 1883. It is a marketing, processing, and shipping center for one of the state's chief citrus-fruit regions, with fruit-cann...

Erie, city, United States

(Encyclopedia)Erie, city (2020 pop. 94,831), seat of Erie co., NW Pa., on Lake Erie; inc. as a city 1851. Pennsylvania's only port on the Great Lakes, Erie is a busy ...

Long, Stephen Harriman

(Encyclopedia)Long, Stephen Harriman, 1784–1864, American explorer, b. Hopkinton, N.H. As an army engineer, Long was sent on several exploring and surveying expeditions. The first in 1817 was to the region of the...

pitchblende

(Encyclopedia)pitchblende pĭchˈblĕndˌ [key], dark, lustrous, heavy mineral, a source of radium and uranium. Largely natural uranium oxides, triuranium octaoxide (U3O8) and uranium dioxide (UO2), it usually cont...

Masuria

(Encyclopedia)Masuria məzo͝oˈrēə [key], Ger. Masurenland, Pol. Mazury, region, N Poland. It is a low-lying area covered by large lakes and forests and drained by many small rivers. The original population of t...

Gobi

(Encyclopedia)Gobi gōˈbē [key], Mandarin Yintai shamo, great stony desert of N central Asia, c.500,000 sq mi (1,295,000 sq km), extending c.1,000 mi (1,610 km) from east to west across SE Mongolia and N China fr...

Cleveland, cities, United States

(Encyclopedia)Cleveland. 1 City (2020 pop. 372,674), seat of Cuyahoga co., NE Ohio, on Lake Erie at the mouth of the Cuyahoga River; laid out (1796) by Moses ...

Peterborough, city, Canada

(Encyclopedia)Peterborough, city (1991 pop. 68,371), SE Ont., Canada, NE of Toronto. It is at the falls of the Otonabee River, which connects, through the Trent Canal, with lakes Ontario and Huron. Settled early in...