Do you know what spelunking is? That's the British term for caving - exploring caves. Caving can be very dangerous - lots of people get lost in caves every year. So you never want to go caving unless you're with a group of people, have all the proper equipment - ropes, compasses, flashlights, warm clothing, etc., and let someone know where you're going. Never venture into a cave alone!
The way to start out your caving career is to visit the vast "commercial caves" in the United States. The most famous is Carlsbad Caverns, but there are others.
I visited the Luray Caverns yesterday. As you drive up to the complex - there's a building for the Luray Caverns, another one for a Car Collection, and another one for a shop, you'd never suspect that hundreds of feet beneath
your feet, there are beautiful caverns filled with stalactites, stalagmites, and all kinds of beautiful rock formations.
The "Draperies" - stalacties that look like draperies.
You can't really tell from this photo, but if you're actually there, when you look at the water, what you think you're seeing is stalactites and so on...but actually it is a reflection of the roof above. The pool itself is only about six inches to a foot deep, and is the largest lake in the Luray Caverns. You can't get the impact from this photo, but it was quite beautiful.
The "Fried Eggs". Two young stalagmites that were broken off at their base, and the water has weathered them such that this is what they look like today. But that whole area of Virginia has such caverns...just a few miles away from the Luray Caverns are the Shenandoah Caverns, which unfortunately I did not go into, and a few others.
Unfortunately, the flash on my camera wouldn't work, and try as I might I couldn't hold my camera steady enough to get clear photos... about 4/5ths of the picures I did take didn't turn out.
Here's the description of the cave from Wikipedia (which is an open source site. "Open source" or "Copyright free" means that anyone can share the text found there. It was written to be shared. If a piece of writing is copyrighted, that means you can't share it without the permission of the original author.
Luray Caverns, originally called Luray Cave, is a large, celebrated commercial cave just west of Luray, Virginia, USA, which has drawn many visitors since its discovery in 1878. The underground cavern system is generously adorned with speleothems (columns, mud flows, stalactites, stalagmites, flowstone, mirrored pools, etc). The caverns are perhaps best known for the Great Stalacpipe Organ, a lithophone made from solenoid fired strikers that tap stalactites of various sizes to produce tones similar to those of xylophones, tuning forks, or bells.
GeologyThe Caverns are situated in the Shenandoah Valley just to the east of the Allegheny Range of the Appalachian Mountains in Luray, Virginia. The Valley extends from the Blue Ridge in the north to the south end of Massanutten Mountain. Cave Hill, 927 feet (283 m) above sea level, had long been an object of local interest on account of its pits and oval hollows or sinkholes (known as karst) through one of which the discoverers of Luray Caverns entered.
Luray Caverns does not date beyond the Tertiary period, though carved from the Silurian limestone. At some period, niches and already formed chambers were completely filled with water, highly charged with acid, which then slowly began to eat away at much of the softer material composing much of the walls, ceilings and floors. One particular area that shows this high level of water is Elfin Ramble where water marks of oscillation are highly visible on the ceiling.
The temperature inside the caverns is uniformly 54 °F (12 °C),[2] comparable to that of Mammoth Cave in Kentucky.
Speleothem formationAs with other limestone or "solution" caves, formations at Luray Caverns result from a solution of calcium carbonate giving up some of its carbon dioxide, thus allowing a precipitation of lime to form. This precipitation begins as a thin deposit ring of crystallized calcite, but continues to collect, creating stalactites and other types of dripstone and flowstone. Formations at Luray Caverns are white in color if the calcium carbonate is in its pure form. Other colors reflect impurities in the calcite resulting from elements absorbed from the soil or rock layers: reds and yellows due to iron and iron-stained clays; black from manganese dioxide; blues and greens from solutions of copper compounds. Luray Caverns remains an active cave where new formation deposits accumulate at the rate of about one cubic inch every 120 years.
After the water had been mostly removed by a lowering in the water table, these eroded forms remained and growth began to take hold via stalactites, stalagmites, columns, etc. Some notable formations include the "Leaning Column", undermined and tilting like the campanile of Pisa; the Organ, a large shield formation, that was used from very early on as an instrument to a variety of folk and religious songs and a vast bed of disintegrated carbonates left by the water in its retreat through the great space called the "Elfin Ramble".
The cavern is yellow, brown or red because of water, chemicals and minerals. The new stalactites growing from the old, and made of hard carbonates that had already once been used, are usually white as snow though often pink or amber-colored. The Empress Column is a stalagmite 35 feet (11 m) high, rose-colored, and elaborately draped. The "Double Column", named from Professors Henry and Baird, is made of two fluted pillars side by side, the one 25 ft (7.6 m) the other 60 feet (18 m) high, a mass of snowy alabaster. Several stalactites in Giant's Hall exceed 5 feet (1.5 m) in length. The "Pluto's Ghost", a pillar, is a ghostly white.
The cascades are formations like foaming cataracts caught in mid-air and transformed into milk-white or amber alabaster. Brands Cascade, a particularly fine one, is 40 feet (12 m) high and 30 feet (9.1 m) wide, and is a wax-like white.
"Saracen's tent" is considered to be one of the most well-formed draperies in the world.Draperies are abundant throughout the cavern and one of the best examples is Saracen's Tent. The drapery formation can be found in all major rooms and ring like bells when struck heavily by the hand. Their origin and also that of certain so-called scarfs and blankets is from carbonates deposited by water trickling down a sloping and corrugated surface. Sixteen of these alabaster scarfs hang side by side in Hoveys Balcony, three white and fine as crape shawls, thirteen striated like agate with every possible shade of brown.
Streams and true springs are absent, but there are hundreds of basins, varying from 1 to 50 feet (15 m) in diameter, and from 6 inches (150 mm) to 15 feet (4.6 m) in depth. The water in them contains carbonate of lime, which often forms concretions, called pearls, eggs, and snowballs, according to their size. On the fracture these spherical growths are found to be radiated in structure.
Calcite crystals line the sides and bottom of water-filled cavities. Variations of level at different periods are marked by rings, ridges and ruffled margins. These are strongly marked about Broaddus Lake and the curved ramparts of the Castles on the Rhine. Here also are polished stalagmites, a rich buff slashed with white, and others, like huge mushrooms, with a velvety coat of red, purple or olive-tinted crystals. In some of the smaller basins with an excess of carbonic acid, there is formed, besides the crystal bed below, a film above, shot like a sheet of ice across the surface. One pool 12 feet (3.7 m) wide is thus covered so as to show but a third of its surface.
The quantity of water in the cavern varies greatly at different seasons. Hence some stalactites have their tips under water long enough to allow tassels of crystals to grow on them, which, in a drier season, are again coated over with stalactitic matter; and thus singular distortions are occasioned. Contiguous stalactites are often inwrapped thus until they assume an almost globular form, through which by making a section the primary tubes appear. Contorted stalactites may be caused by lateral outgrowths of crystals growing from the side of an active stalactite, or to deflections caused by currents of air, or to the existence of a diminutive fungus peculiar to the locality and designated from its habitat Mucor stalaclitis.
The dimensions of the chambers included in Luray Caverns cannot be easily stated, due to the great irregularity of their outlines. There are several tiers of galleries, and the vertical depth from the highest to the lowest is 260 feet (79 m).
Luray Cavern watersThere is a spring of water called Dream Lake that has an almost mirror like appearance. Stalactites are reflected in the water making them appear to be stalagmites. This illusion is often so convincing that people are unable to see the real bottom. It looks quite deep, as the stalactites are higher above the water, but at its deepest point the water is only around 20 inches deep. The lake is connected to a spring that continues deeper into the caverns. The Wishing Well is a green pond with coins three feet deep at the bottom. Like Dream Lake, the well also gives an illusion, however it is reversed. The pond looks 3-4 feet deep but at its deepest point it is actually 6-7 feet deep.
History
DiscoveryLuray Caverns was discovered on August 13, 1878 by five local men, including Andrew J. Campbell (a local tinsmith), his 13-year-old nephew Quint, and local photographer Benton Stebbins.[1] Their attention had been attracted by a protruding limestone outcrop and by a nearby sinkhole noted to have cool air issuing from it. Seeking an underground cavern, the men started to dig and, about 4 hours later, a hole was created for the smallest men (Andrew and Quint) to squeeze through, slide down a rope and explore by candlelight. The first column they saw was named the Washington Column, in honor of the first United States President. Upon entering the area called Skeleton's Gorge, bone fragments (among other artifacts) were found embedded in calcite. Other traces of previous human occupation included pieces of charcoal, flint, and human bone fragments embedded in stalagmite. A skeleton, thought to be that of a Native American girl, found in one of the chasms, was estimated, from the current rate of stalagmitic growth, to be not more than 500 years old. Her remains may have slipped into the caverns after her burial hole collapsed due to a sinkhole, although the real cause is unknown. They are now in storage at the National Museum of American History in Washington, D.C.
LitigationSam Buracker of Luray owned the land on which the cavern entrance was found. Because of uncollected debts, a court-ordered auction of all his land was held on September 14, 1878. Andrew Campbell, William Campbell, and Benton Stebbins purchased the cave tract, but kept their discovery secret until after the sale. Because the true value of the property was not realized until after the purchase, legal wrangling ensued for the next 2 years with attempts to prove fraud and decide rightful ownership. In April 1881, the Supreme Court of Virginia nullified the purchase by the cave discoverers. William T. Biedler of Baltimore (Buracker's in-law and major creditor) then sold the property to The Luray Cave and Hotel Company, a subsidiary of the Shenandoah Railroad Company. (The SRC became the Norfolk and Western Railroad Company in April 1881.) David Kagery of Luray and George Marshall of Uniontown, Pennsylvania, purchased the property in July 1890 and in October of that year the tract was sold to the Valley Land and Improvement Company. Under bankruptcy proceedings in 1893, the property was bought by Luray Caverns Company, owned by J. Kemp Bartlett of Baltimore.
Despite the legal disputes, rumors of the caverns' impressive formations spread quickly. Professor Jerome J. Collins, the Arctic explorer, postponed his departure on an ill-fated North Pole expedition to visit the caverns. The Smithsonian Institution sent a delegation of nine scientists to investigate. The next edition of the Encyclopedia Britannica devoted an unprecedented page and a half to the cave's wonders and Alexander J. Brand, Jr., a correspondent for the New York Times, was the first professional travel writer to visit and popularize the Caverns.
SanatoriumIn 1901, the cool, supposedly pure air of Luray Caverns was forced through the rooms of the Limair Sanatorium, erected on the summit of Cave Hill by Colonel T.C. Northcott, former president of the Luray Caverns Corporation.[1] The Colonel billed "Limair," as the first air-conditioned home in the United States. On the hottest day in summer, the interior of the house was kept at a cool and comfortable 70 °F (21 °C). By sinking a shaft five feet in diameter down to a cavern chamber and installing a 42-inch (1,100 mm) fan powered by a 5 horsepower (3.7 kW) electric motor, Northcott’s system could change out the air through the entire house about every 4 minutes. Tests made over successive years by means of culture media and sterile plates, were considered to have demonstrated the "perfect bacteriologic purity" of the air, purportedly a benefit to those suffering various respiratory illnesses. This "purity" was explained by a natural filtration process with air drawn into the caverns through myriad rocky crevices, then further cleansing by air floating over the transparent springs and pools, the product finally being supplied to the inmates of the sanatorium. (The "Limair" burned down in the early 1900s but was subsequently rebuilt as a brick building.) The Luray Caverns Corporation, which was chartered by Northcott, purchased the caverns in February 1905 and continues to hold the property today.
Portions of the Caverns are open to the public and have long been electrically lighted. The registered number of visitors in 1906 was 18,000, but now, about 500,000 guests visit each year.
In 1974, the National Park Service and the Department of Interior designated Luray Caverns as a National Natural Landmark.
Flowstones are composed of sheetlike deposits of calcite formed where water flows down the walls or along the floors of a cave. They are typically found in "solution", or limestone caves, where they are the most common speleothem. However, they may form in any type of cave where water enters that has picked up dissolved minerals.
The deposits may grade into thin sheets called "draperies" or "curtains" where they go over overhanging portions of the wall. Some draperies are translucent, and some have brown and beige layers that look much like bacon (often termed "cave bacon").
A soda straw (or simply straw) is a speleothem in the form of a hollow mineral tube. They grow in places where water leaches slowly through cracks in rock, such as on the roofs of caves. A soda straw can turn into a stalactite if the hole at the bottom is blocked, or if the water begins flowing on the outside surface of the tube.
