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Great Southern Reef

(Encyclopedia)Great Southern Reef, rocky reef complex, c. 27,000 sq mi (70,000 sq km), extending almost 5,000 mi (8,100 km) along S and SW Australia coast, from Brisbane to Perth. The reef's temperate marine ecosys...

Great Artesian Basin

(Encyclopedia)Great Artesian Basin, c.670,000 sq mi (1,735,300 sq km), between the Eastern Highlands and the Western Plateau, E central Australia, extending S from the Gulf of Carpentaria, Queensland, to NE South A...

Great Leap Forward

(Encyclopedia)Great Leap Forward, 1957–60, Chinese economic plan aimed at revitalizing all sectors of the economy. Initiated by Mao Zedong, the plan emphasized decentralized, labor-intensive industrialization, ty...

Great Lakes, North America

(Encyclopedia)Great Lakes, group of five freshwater lakes, central North America, creating a natural border between the United States and Canada and forming the largest body of freshwater in the world, with a combi...

Great Slave Lake

(Encyclopedia)Great Slave Lake, second largest lake of Canada, c.10,980 sq mi (28,400 sq km), Northwest Territories, named for the Slave (Dogrib), a tribe of Native Americans. It is c.300 mi (480 km) long and from ...

Great Wall of China

(Encyclopedia)Great Wall of China, series of fortifications, c.3,890 mi (6,260 km) long (not including trenches and natural defensive barriers), winding across N China from Gansu prov. to Liaoning prov. The wall, r...

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