Carsten Peter: Vietnam's Infinite Cave

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cave

Naturally formed underground cavity. A cave often consists of a number of underground chambers, constituting a series of caverns. An assemblage of such caverns interconnected by smaller passageways makes up a cave system. Primary caves, such as lava tubes and coral caves, develop during the time when the host matrix is solidifying or being deposited. Secondary caves, such as marine grottoes, originate after the host matrix has been deposited or consolidated. Most caves are of the latter type, including solution caves formed by the chemical dissolution of a soluble host rock that has been weakened by fracturing and mechanical erosion; Mammoth Cave and Carlsbad Caverns are examples of solution caves.

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Vietnam

Country, Southeast Asia. Area: 127,882 sq mi (331,212 sq km). Population (2009 est.): 88,577,000. Capital: Hanoi. The great majority of the population is Vietnamese; minorities include Chinese, Hmong, Thai, Khmer, and Cham. Languages: Vietnamese (official), French, Chinese, English, Khmer. Religions: Buddhism, new religions, traditional beliefs, Christianity. Currency: dong. Vietnam is about 1,025 mi (1,650 km) long, 210–340 mi (340–550 km) wide at its widest parts, and 30 mi (50 km) wide at its narrowest part. Northern Vietnam is mountainous; Fan Si Peak, the country's highest mountain, rises to 10,312 ft (3,143 m). The Red River is the principal river. Southern Vietnam is dominated by the Mekong River delta. A long, relatively narrow coastal plain connects the two major river deltas. The densely forested Annamese Cordillera extends through west-central Vietnam. Northern Vietnam is rich in mineral resources, especially anthracite coal and phosphates. Some petroleum deposits exist off the southern coast. Significant food crops include rice, sugarcane, coffee, tea, and bananas. Food processing and fishing are important industries, as are the manufacture of steel and phosphates. Vietnam is a socialist republic with one legislative house; its head of state is the president, and its head of government is the prime minister.

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