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Snail Shell Cave is a limestone cave in Rockvale, Tennessee. Snail Shell Cave lies on an preserve near Murfreesboro, Tennessee. Snail Shell cave is owned by the Southeastern Cave Conservancy, which has called it "one of the most biologically significant cave sites in the southeastern United States."〔(SCCi Acquires Snail Shell Cave: 88-Acre Preserve Established near Murfreesboro, Tennessee ), Southeastern Cave Conservancy, Inc. website (accessed March 23, 2008)〕 The cave has more than of surveyed passages, making it the longest continuous cave in the Tennessee Central Basin region. It is part of a system of caves known to have more than of passages.〔 The mouth of Snail Shell Cave is a sinkhole, with nearly vertical walls, 125 feet in diameter and 60 feet deep. The cave stream flows across the bottom and may be followed upstream or downstream. The entrance to Snail Shell Cave was known to local residents, but deep water prevented serious exploration. Tom Barr and Bert Denton located the entrance in September 1951 and became the first modern cave explorers in the cave. "〔The Snail Shell System of Tennessee" by Jeff Sims and Charles Cark, NSS News, August, 1982, pages 206-215.〕 Anyone wishing to visit Snail Shell Cave must have permission from the Southeastern Cave Conservancy, Inc. to enter the cave. At least one member of any group entering the cave is required to be either an SCCi or an NSS (National Speleological Society) member. Due to the deep water and flooding conditions encountered in this cave, this cave must be considered extremely dangerous and should not, under any circumstances, be entered by anyone who is not a highly skilled cave explorer. Several people have already died in this cave. For the most complete information available on Snail Shell Cave and the other caves that compose the Snail Shell Cave System, you may wish to consult the book "Snail Shell Cave" (August, 2012) by Larry E. Matthews and Bob Biddix. Published by the National Speleological Society, this book is 241 pages long and contains numerous maps and photographs of the caves. ("Snail Shell Cave", ISBN 978-1-879961-44-9) ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Snail Shell Cave」の詳細全文を読む スポンサード リンク
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