Luray Caverns

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 noted for the Great Stalacpipe Organ, a lithophone made from solenoid fired strikers Fact|date=February 2008 that tap stalactites of various sizes to produce tones similar to those of xylophones, tuning forks, or bells.

Geology

The 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, convert|927|ft|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 convert|54|°F|°C|abbr=on, comparable to that of Mammoth Cave in Kentucky.

peleothem formation

As 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.

Celebrated speleothems

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 (see The Great Stalacpipe Organ); and a vast bed of disintegrated carbonates left by the water in its retreat through the great space called the Elfin Ramble.

The old material is yellow, brown or red; and, its wavy surface often shows layers like the gnarled grain of costly woods. 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 convert|35|ft|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 convert|25|ft|m|abbr=on the other convert|60|ft|m high, a mass of snowy alabaster. Several stalactites in Giant's Hall exceed convert|5|ft|m in length. The smaller pendants are innumerable; in the canopy above the Imperial Spring it is estimated that 40,000 are visible at once.

The cascades are formations like foaming cataracts caught in mid-air and transformed into milk-white or amber alabaster. Brands Cascade, the finest of all, is convert|40|ft|m high and convert|30|ft|m wide, and is a wax-like white.

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 convert|50|ft|m in diameter, and from convert|6|in|mm to convert|15|ft|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 convert|12|ft|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 convert|260|ft|m.

Flora and fauna

The waters of this cavern contains some forms of life, most abundantly are tiny freshwater shrimp; also existing in the caverns are tiny lizards common to the area as well as a few arthropods such as spiders, flies, and small centipedes. There are also several forms of "cave algae" and "cave moss" growing naturally in the Cavern due to lighting and humidity. A fern grows in the entrance chamber, but this was actually planted there, and does not grow naturally.

History

Discovery

Luray 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. 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.

Litigation

Sam 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.

anatorium

In 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. 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 convert|70|°F|°C|abbr=on. By sinking a shaft five feet in diameter down to a cavern chamber and installing a convert|42|in|mm|sing=on fan powered by a convert|5|hp 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 myriads of 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.

Commercialization

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.

See also

* Cave
* The Great Stalacpipe Organ
* Luray Caverns Blind Cave Millipede, "discovered in the Caverns"

References

*Ryder, J.A. (1881), "List of the North American species of myriapods belonging to the family Lysiopetalidae, with a description of a blind form from Luray Cave, Virginia", "Proceedings of the U. S. National Museum", 3: 524-529.
*1911

External links

* [http://www.luraycaverns.com/ Luray Caverns website]
* [http://www.stalacpipe.net/ stalacpipe.net]
*Geolinks-US-streetscale|38.664378|-78.481781