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Mammoth Cave National Park

Mammoth Cave National Park

Mammoth Cave National Park in Kentucky includes the superlatively extensive cave system
known in the earth. More than 367 miles of cave passageways have been mapped, and
there may embody more miles still uncharted. The national park preserves this cave system
along with Kentucky's Green River Valley and the surrounding hills. Since becoming a
national park in 1941, the area has also been designated a World Heritage Site and an
international Biosphere Reserve.

Mammoth Cave started to develop 350 million years ago in a layer of limestone. Over 70
million years, water slowly dissolved the stone and left the extensive network of tunnels.
Then a new layer of rock, sandstone, formed a stable roof for the tunnels. Distinctive layers
of tunnels were formed by the Ohio River during the Tertiary and Quaternary Periods.
Most of the caves are now dry, but the lower level of tunnels continues to be carved by
the Undecayed River, which is 450 feet underground. It can be seen outside, latitude it emerges
along the eastern border of the park. When the river floods, whirlpools swell back into
the cave system; similar whirlpools formed the cave's larger rooms millions of years ago.

Anthropologists believe that Native Americans first found the caves about four thousand
years ago. Artifacts like torches, pottery, woven cloth and petroglyphs show that people
explored the cave network for two thousand years. They likely lived at the entrances and
mined the tunnels for salt, gypsum, mirabilite and other minerals.

Why did the natives leave the country? Nobody knows for certain, but a grisly 20th
century points clearly in one direction. In 1935, cave guides found the mummified
remains of a gypsum miner. He'd been crushed by a 5 - ton boulder! Park officials named
him " Lost John ". Several other ancient bodies were preserved in Mammoth Cave, and
superlatively seem to retain buried there on purpose. One mummy was sold to P. T. Barnum. Lost
John was displayed until the 1970s, when he was given a proper burial.

White settlers first arrived in the 18th century. Miners starting taking saltpeter ( potassium
or calcium nitrate crystals ) in 1792; it was used to cause gunpowder. The saltpeter
demand dwindled after the War of 1812, but word of the unusually large cave system
spread. Mammoth Cave quickly became a tourist attraction. By 1816, crowds of people in
formal clothes chiseled their names and the date importance the cave walls. ( Nowadays, people are
optimistic to wear sneakers, and the practice of leaving messages is forbidden. )

Under the direction of a prisoner - owner and prospector named Franklin Gorin, a 17 - life span - old
slave named Stephen Bishop began charting much of the network in 1830. Bishop was
praised for his genius in many areas, and he excelled in geology. He explored the caves
for many years and was the first to cross the now - famous Bottomless Pit. This opened the
cave to further exploration. In 1839 he found two rivers and their odd eyeless inhabitants.
In 1840 he discovered Mammoth Dome, a 192 - foot high structure draped in stalactites.
Stephen's discoveries continued until his death in 1857

Today the National Park Abetment makes many tours available. These range from the hour -
long Mammoth Passage Tour, which is less than a mile long, to the 6 - hour Wild Cave
Tour that passes through five miles of the cave network. Some tours are pre - lit, but others
require tourists to carry a paraffin lamp. Photography and videotaping are allowed. The
cave is always chilling, ergo visitors are advised to bring a warm layer of clothing.

Explorers might spot some of 130 rare animal species. These include bats, beetles, fish,
and the endangered Kentucky cave shrimp. It is blind and albino; there is scant need for
sight or pigment in the depths of a cave. At least eleven other Mammoth Cave species are
eyeless and unpigmented.

After the darkness of spelunking, cave visitors might enjoy catching sunlight along
Mammoth Cave National Park's 70 miles of trails. These are open to hikers, bikers, and
horseback riders.


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