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Hot Springs National Park



 
 
Established from Hot Springs Reservation, Hot Springs National Park is a United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
 National Park
National park

A national park is a reserve of land, usually declared and owned by a national government, protected from most human development and pollution....
 in central Arkansas
Arkansas

Arkansas is a U.S. state located in the Southern United States of the United States. Arkansas shares a border with six states, with its eastern border largely defined by the Mississippi River....
 adjacent to the city of Hot Springs
Hot Springs, Arkansas

Hot Springs is the 10th most populous city in the U.S. state of Arkansas, the county seat of Garland County, Arkansas, and the principal city of the Hot Springs Metropolitan Statistical Area encompassing all of Garland County....
. Hot Springs Reservation was initially created by an act of the United States Congress
United States Congress

The United States Congress is the Bicameralism legislature of the Federal government of the United States of the United States of America, consisting of two houses, the United States Senate and the United States House of Representatives....
 on April 20, 1832, and the area was made a national park on March 4, 1921. It is by far the smallest national park by area in the United States.

The hot springs flow from the western slope of Hot Springs Mountain, part of the Ouachita Mountain
Ouachita Mountains

The Ouachita Mountains are a mountain range located in west central Arkansas and Kiamichi country Oklahoma. The range's subterranean roots may extend as far as central Texas, or beyond it to the current location of the Marathon Uplift....
 range.






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Encyclopedia


Established from Hot Springs Reservation, Hot Springs National Park is a United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
 National Park
National park

A national park is a reserve of land, usually declared and owned by a national government, protected from most human development and pollution....
 in central Arkansas
Arkansas

Arkansas is a U.S. state located in the Southern United States of the United States. Arkansas shares a border with six states, with its eastern border largely defined by the Mississippi River....
 adjacent to the city of Hot Springs
Hot Springs, Arkansas

Hot Springs is the 10th most populous city in the U.S. state of Arkansas, the county seat of Garland County, Arkansas, and the principal city of the Hot Springs Metropolitan Statistical Area encompassing all of Garland County....
. Hot Springs Reservation was initially created by an act of the United States Congress
United States Congress

The United States Congress is the Bicameralism legislature of the Federal government of the United States of the United States of America, consisting of two houses, the United States Senate and the United States House of Representatives....
 on April 20, 1832, and the area was made a national park on March 4, 1921. It is by far the smallest national park by area in the United States.

The hot springs flow from the western slope of Hot Springs Mountain, part of the Ouachita Mountain
Ouachita Mountains

The Ouachita Mountains are a mountain range located in west central Arkansas and Kiamichi country Oklahoma. The range's subterranean roots may extend as far as central Texas, or beyond it to the current location of the Marathon Uplift....
 range. In the park, the hot springs have not been preserved in their unaltered state as natural surface phenomena. They have instead been managed to conserve the production of uncontaminated hot water for public use. The mountains within the park are also managed within this conservation philosophy in order to preserve the hydrological system that feeds the springs.

People have used the hot spring water in therapeutic baths for more than two hundred years to treat rheumatism
Rheumatism

Rheumatism or Rheumatic disorder is a non-specific term for medical problems affecting the heart, bones, joints, kidney, skin and lung. The study of, and therapeutic interventions in, such disorders is called rheumatology....
 and other ailments. While it was a reservation, the area developed into a well-known resort nicknamed "The American Spa" which attracted not only the wealthy but indigent health seekers from around the world as well.

The park includes portions of downtown Hot Springs, making it one of the most easily visited national parks. There are numerous hiking trails and camping areas. Bathing in spring water is available in approved facilities at extra cost. The entire "Bathhouse Row
Bathhouse Row

Bathhouse Row, located in Hot Springs National Park, Arkansas, is a collection of bathhouses in the town of Hot Springs, Arkansas. The bathhouses were included in 1832 when the Federal Government took over four parcels of land to preserve 47 natural hot springs, their mineral waters lacking the sulphur smell of most hot springs, and t...
" area is a National Historic Landmark
National Historic Landmark

A National Historic Landmark is a building, :wiktionary:site, structure, object, or district, that is officially recognized by the Federal government of the United States for its historical significance....
 District that contains the grandest collection of bathhouses of its kind in North America
North America

North America is the northern continent of the Americas, situated in the Earth's northern hemisphere and almost totally in the western hemisphere....
, including many outstanding examples of Gilded Age
Gilded Age

The Gilded Age was a time period when some activity or skill was at its peak. The wealth polarization derived primarily from industrial and population expansion.The businessmen of the Second Industrial Revolution created industrial towns and cities in the Northeastern United States with new factories, and contributed to the creation of an ethnica...
 architecture
Architecture

The term architecture can refer to a process, a profession or documentation.As a process, architecture is the activity of designing and construction buildings and other physical structures by a person or a computer, primarily to provide shelter....
. The row's Fordyce Bathhouse serves as the park's visitor center; the Buckstaff is currently the sole bathhouse operating in its original capacity. Other buildings of the row are currently in various states of interior restoration.

The park has become increasingly popular in recent years, and recorded over 1.5 million visitors in 2003, as well as nearly 2.5 non-recreational visitors.
Hots Springs National Park Aerial

Discovery & Protection

Spanish explorer Hernando de Soto
Hernando de Soto (explorer)

Hernando de Soto was a Spanish people Exploration and conquistador who, while leading the first European expedition deep into the territory of the modern-day United States, was the first European to discover the Mississippi River....
 was the first European to see what Native Americans
Native Americans in the United States

Native Americans in the United States are the Indigenous peoples of the Americas from the regions of North America now encompassed by the continental United States United States, including parts of Alaska and the island state of Hawaii....
 referred to as the Valley of the Vapors when he and his men reached the area in 1541. Members of many Native American tribes had been gathering in the valley for over 8,000 years to enjoy the healing properties of the thermal springs. Around the 18th century the Caddo
Caddo

The Caddo Nation is a confederacy of several Southeastern tribes Native Americans in the United States tribes, who, in the 16th century, inhabited much of what is now East Texas, western Louisiana and portions of southern Arkansas and Oklahoma....
 settled in the area, followed by the Choctaw
Choctaw

The Choctaw are a Native Americans in the United States people originally from the Southeastern United States . They are of the Muskogean languages group....
, Cherokee
Cherokee

The Cherokee are a Native Americans in the United States people orginally from the Southeastern United States . They are linguistically connected to speakers of the Iroquoian language....
, and other tribes. There was agreement among the tribes that they would put aside their weapons and partake of the healing waters in peace while in the valley. The Quapaw
Quapaw

The Quapaw people are a tribe of Native Americans in the United States who historically resided on the west side of the Mississippi River in what is now the state of Arkansas....
 lived in the Arkansas River
Arkansas River

The Arkansas River is a major tributary of the Mississippi River. The Arkansas generally flows to the east and southeast and traverses the U.S....
 delta area and visited the springs.

In 1673 Father Marquette and Jolliet
Louis Jolliet

Louis Jolliet, also known as Louis Joliet with only one L , was a French Canadian List of explorers. Jolliet is important for his discoveries in North America....
 explored the area and claimed it for France
France

France , officially the French Republic , is a country whose Metropolitan France is located in Western Europe and that also comprises various Overseas departments and territories of France....
. The Treaty of Paris 1763 ceded the land back to Spain, however in 1800 control was returned to France until the Louisiana Purchase
Louisiana Purchase

The Louisiana Purchase was the acquisition by the United States of America of of the French territory Louisiana in 1803. The U.S. paid 60 million French franc plus cancellation of debts worth 18 million francs , a total cost of $15,000,000 for the Louisiana territory....
 of 1803.

In December 1804 Dr. George Hunter
George Hunter

George Hunter may refer to:* George Hunter , businessman and philanthropist who made his fortune bottling Coca-Cola* George Hunter , author and authority on decorative art...
 and William Dunbar
William Dunbar (explorer)

William Dunbar was an American merchant, naturalist, astronomer and explorer....
 made an expedition to the springs, finding a lone log cabin and a few rudimentary shelters used by people visiting the springs for their healing properties. In 1807 Jean Emmanual Prudhomme became the first settler of modern Hot Springs, although after he regained his health following two years of bathing in the hot water and eating local foods, he returned home to Louisiana. Not long afterward John Perciful and Isaac Cates arrived.

Having been placed in a reservation southeast of Hot Springs in the 19th century, on August 24,1818, the Quapaw Indians ceded the land around the hot springs to the United States in a treaty. After Arkansas became its own territory in 1819, the Arkansas Territorial Legislature requested in 1820 that the springs and adjoining mountains be set aside as a federal reservation. Twelve years later, in 1832, the national reservation was formed by Congress, granting federal protection of the thermal waters and giving Hot Springs the honor of being the first “national park” to be designated for such government protection. The Hot Springs Reservation was set aside for public use as a park on June 16, 1880.

National Park


In 1921, by act of Congress, the site's name was changed from the Hot Springs Reservation to the Hot Springs National Park. Growing to over , it included Hot Springs Mountain, North Mountain, West Mountain, Sugar-Loaf Mountain and Whittington Lake Park. It later was expanded to .

The springs are all grouped about the base of the Hot Springs Mountain, with a flow well over a half million gallons a day. The hot water is supplied to the various bathhouses with resulting income going to the U.S. Treasury. There are miles of roads and trails over the mountains. The park is open throughout the year.

The first bathhouses were really little more than brush huts and log cabins placed over excavations cut in the rocks to receive hot water that flowed from the springs. More elaborate bathing facilities soon developed, with wooden troughs delivering water from hillside springs to bathhouses along the east bank of Hot Springs Creek. Some of the tufa covering the hillside was excavated to accommodate the bathhouses. The narrow street along the west side of the creek was connected to the bathhouses by narrow bridges.

After direct federal supervision was exercised in 1877, major improvements were made. The creek was covered with stone arches, and above a street a hundred feet wide was built. All the squatters were evicted, rubbish cleaned, and a centralized plumbing system was begun. This was completed around 1890. In 1950 central cooling towers limited the maximum temperature to a safe level, so individual bathhouses no longer needed their own cooling systems.

The park operates a public campground at Gulpha Gorge, about two miles (3 km) from downtown Hot Springs.

City of Hot Springs


The city of Hot Springs (incorporated 1851) is governed under State and municipal law. The National Park Service exercises no control or supervision over any matters connected with the city. The city's buildings are as close as across Central Avenue from Bathhouse Row, and has extended beyond the narrow valley in which the springs are located and spreads out over the open plain to the south and east. The climate is good throughout the year. The elevation of the city is above sea level, with surrounding hills rising another . In earlier days the city was a summer resort, but hotels have now long stayed open during the winter due to many northerly patrons escaping the winter cold.

During the peak popularity of the hot springs, until the 1950s, the many patients staying for three weeks, six weeks, or longer were a large source of business for the numerous hotels, boarding houses, doctors, and drugstores. As the daily treatments required only an hour or two, the visitors' idle time created opportunities for other businesses in the town.

Bathing customs


It was believed the waters benefited diseases of the skin and blood, nervous affections, rheumatism and kindred diseases, and the "various diseases of women". In the case of tuberculosis
Tuberculosis

Tuberculosis is a common and often deadly infectious disease caused by mycobacterium, mainly Mycobacterium tuberculosis . Tuberculosis usually attacks the lungs but can also affect the central nervous system, the lymphatic system, the circulatory system, the genitourinary system, the gastrointestinal system, bones, joints, and even the...
 and lung diseases, and acute and inflammatory diseases, the use of the waters was considered injurious and in many cases very dangerous.

The earliest bathing procedure consisted of merely reclining in natural pools of hot springs and cool creek water for long periods of time. During the 1820s crude vapor baths stood over the springs, and bathers breathed in the vapors for extended periods of time. Wooden tubs were added to some bathhouses in the 1830s. Physicians began arriving in the 1850s, although many visitors did without their services; visitors remained from one week to two months. After the Civil War a tub bath of 15 to 20 minutes was common.

During the 1870s the bathing regimen became more diverse, and physicians prescribed various types of baths for patients. The period of time for tub baths became six to ten minutes and the time in the steam bath shortened to two minutes, with only one bath a day.

The treatment was by drinking and bathing in the waters, producing a profuse perspiration, which was considered an active agent in fighting disease. The advice of a physician who was familiar with the use of the waters was considered necessary to avoid injury. In many cases medicine was required before using the waters, although it had been observed that the amount of drugs given was "enough to sicken a well man."

The hot baths were usually taken once a day for three weeks, when a rest was necessary (often with a week at the sulphur springs near the Ouachita River). A second three weeks' course was then taken, followed again by an abstinence from bathing for several days. The usual stay at the springs was from one to three months, but many invalids stayed a year and longer.

The process described in 1878 was a hot bath of 90° to for about 3 minutes (timed with a sand-glass). This was followed by another three minutes with all but the head in a steam box, or if milder treatment was prescribed, sitting atop the steam box covered with a blanket. During this the bather is also drinking hot water from their coffee-pot. After these eight to ten minutes of treatment, the bather is well rubbed down and thoroughly dried. The blanket-covered customer then would walk briskly back to their quarters to lie down for at least a half hour to let the body recover its normal temperature. Sleeping at this stage was considered dangerous.

The bathhouses began using vapor cabinets around 1884. The bather sat in the cabinet for 10-20 minutes with the lid closed tightly around the neck, with vapor from the hot water rising through the floor of the cabinet, with temperatures around 110-130 degrees. Toward the end of the 1880s Russian and Turkish baths were offered, and in the 1890s German needle baths and Scotch douches (concentrated stream of hot or cold water, often used on the back) were added.

Although details of services were left to bathhouse operators, the Park's superintendent set various rules. In the 1930s a tub bath could not take more than 20 minutes and shower no more than 90 seconds. During the next decade shower time was reduced to a minute, with maximum temperatures specified for several services. After a bath of about 98 degrees, the patient might spend 2-5 minutes in a vapor cabinet, get 15 minutes of packs (wet, hot or cold), followed by a tepid needle shower and light massage and alcohol rub.

By 1980 one reporter described getting a 20 minute bath, two minutes in a steam bath, 15 minutes wrapped with hot packs, and resting in a cooling room for 20-30 minutes.

The current modern facilities are oriented toward spa style or pool services.

Pay bathhouses


There have been nearly two dozen pay bathhouses open at the same time, with about nine of those within the park's "Bathhouse Row" (these numbers have varied for reasons such as the Quapaw now using the space formerly occupied by two bathhouses). Nine of the bathhouses were associated with hotels, hospitals, or sanatoria. The water is the same for all, but the prices charged for the baths varied in accordance with the equipment and accommodations furnished by each facility. The charges for the services of the attendants are the same and include the necessities except towels, blankets, bathrobes, laundering, rubbing mercury, and handling of invalids.

In 1929, prices for single baths ranged from $1 to $1.40, while a course of 21 baths was $16 to $24. Baths were offered at the Arlington Hotel
Arlington Hotel (Hot Springs National Park, Arkansas)

The Arlington Resort Hotel & Spa is a nearly 500 room resort in the Ouachita Mountains of Hot Springs National Park, Arkansas, home of Oaklawn Race Track and the Arkansas Derby....
, Fordyce, Buckstaff, Eastman Hotel, Maurice, La Mar, Majestic Hotel, Quapaw, Hale, Imperial, Moody Hotel, Ozark, St. Joseph's Infirmary, Superior, Ozark Sanatorium, Rockafellow, Alhambra, Pythian (colored), and Woodmen of Union (colored).

At present on Bathhouse Row only the Buckstaff is open, with the Quapaw scheduled to open in 2008. The Arlington Hotel, Austin Hotel and Convention Center, and The Springs Hotel & Spa also offer hot spring baths using the Park water.

Army and Navy Hospital

The Army and Navy General Hospital (now the Rehabilitation Center) was also supplied with water from the springs. It is located behind the south end of Bathhouse Row along the base of Hot Springs Mountain. It was administered by the War Department for the benefit of military members, officers of the Public Health Service, and honorably discharged veterans, who suffered from such diseases as the waters of the hot springs had an established reputation in benefiting. However, admission was not extended to mild and transient cases with should yield to ordinary treatment, but were reserved for those of a serious and obstinate character, which, though resisting ordinary methods of relief, were promised a rapid and permanent recovery from the use of the waters of the spring.

The facility now known as the Hot Springs Rehabilitation Center was built in 1933 as the second Army-Navy hospital. It has been used by the state for over 40 years.

Government free baths


The Government free bathhouse for the indigent was established by Congress on December 16, 1878. The Ral Hole mudpit and pool were closed, and later the first Government Free Bathhouse operated at the site.

During the 1880s a few of the open springs gradually dried up. Corn Hole, a popular spring for people to soak their feet, dried up in 1882. Other open springs were either covered over by the government or the bathhouse owners to prevent their pollution.

Nearly 100,000 baths a year were given to the poor. Applicants for free baths were required to make an oath that they were without and unable to obtain means to pay for the baths, with violations being a misdemeanor subject to fine and/or imprisonment. Tickets were issued to those who, after examination, were found to be suffering from diseases which were reasonably expected to be benefited from the baths.

A new bathhouse was built in 1904, with separate facilities for black and white patrons. The materials used in construction were of poor quality. A new bathhouse was built off the reservation, and it opened in 1922.

The Government free bathhouse was a concrete building fully equipped for bathing large numbers of people under sanitary conditions. In 1878 the Army and Navy opened a free dispensary on the second floor, which remained open for two years. In 1916 the Public Health Service opened a clinic for the examination and treatment of indigents taking the free baths.

The Park Service reminded people that they had to provide their own board and lodging and to have return travel fare, due to many destitute invalids who arrived each year with the mistaken the belief that there was a public institution at which they would be cared for free of charge.

The free bathhouse closed in 1957, when it was much more economical to have the few indigent customers distributed among the commercial bathhouses. The poor applied at park headquarters and upon approval by a physician were sent to a participating bathhouse, which was reimbursed by the government.

Flora and fauna


The area is primarily forest. The northern slopes of the ridges and basins provide a suitable habitat for deciduous forest dominated by oak
Oak

The term oak can be used as part of the common name of any of about 400 species of trees and shrubs in the genus Quercus , which are listed in the List of Quercus species, and some related genera, notably Lithocarpus....
 and hickory
Hickory

Trees in the genus Carya are commonly known as Hickory. The genus includes 17?19 species of deciduous trees with pinnately compound leaf and large nut ....
. Pines predominate on the south sides of the ridges. There are of unlogged pine and oak forests on North and Hot Springs Mountains, and on Sugarloaf Mountain. These old growth forest
Old growth forest

Old growth forest is a type of forest that has attained great age and so exhibits unique biology features.Old growth forests typically contain large live trees, large dead trees , and large logs, as well as many other common characteristics representative of forests in general....
s contain shortleaf pine
Shortleaf Pine

Pinus echinata is a species of pine native to the Eastern United States United States from southern New York south to northern Florida, west to the extreme southeast of Kansas, and southwest to eastern Texas....
, blackjack oak
Blackjack oak

Quercus marilandica is a small oak, one of the list of Quercus species#Section Lobatae Quercus sect. Lobatae, but fairly isolated from the others....
, and white oak, many of the trees over 130 years old, and a few over 200 years old.

Bison
Bison

Bison is a taxonomic group containing six species of large even-toed ungulates within the subfamily Bovinae. Only two of these species still exist: the American bison and the European bison, or wisent , each with two subspecies....
, wapiti
Wapiti

Wapiti may refer to:...
, mountain lion and wolf left the region after European settlement. Present day fauna include squirrel
Squirrel

File:Eichh?rnchen D?sseldorf Hofgarten edit.jpgA squirrel is one of many small or medium-sized rodents in the family Sciuridae. In the English language-speaking world, squirrel commonly refers to members of this family's genus Sciurus and Tamiasciurus, which are tree squirrels with large bushy tails, indigenous to Asia, the America...
, rabbit
Rabbit

Rabbits are small mammals in the family Leporidae of the order Lagomorpha, found in several parts of the world. There are seven different genus in the family taxonomy as rabbits, including the European rabbit , Cottontail rabbit , and the Amami rabbit ....
, opossum, fox
Fox

A fox is an animal belonging to any one of about 27 species of small to medium-sized Canidae, characterized by possessing a long, narrow snout, and a bushy tail, or brush....
, coyote
Coyote

The coyote , also known as the prairie wolf, is a species of canid found throughout North America and Central America, ranging from Panama in the south, north through Mexico, the United States, and Canada....
, skunk
Skunk

Skunks are mammals best known for their ability to excrete a strong, foul-smelling #Anal scent glands. General appearance ranges from species to species from black and white to brown or cream colored....
, raccoon
Raccoon

Procyon is a genus of nocturnal mammals, comprising three species commonly known as raccoons, in the family Procyonidae. The most widespread species, the Raccoon , is often known simply as "the" raccoon, as the two other raccoon species in the genus are native only to the tropics and are considerably lesser-known....
, gopher
Gopher

Gopher may refer to:* Gopher , including:** True gopher, i.e. pocket gopher or member of Geomyidae, native to North America** Richardson's Ground Squirrel, a species of Spermophilus...
, weasel
Weasel

Weasels are mammals in the genus Mustela of the Mustelidae family .Originally, the name "weasel" was applied to one species of the genus, the European form of the Least Weasel ....
, mink
Mink

There are two living species of mink: the American Mink and the European Mink. The extinct Sea Mink is related to the American Mink, but is much larger....
, rat
Rat

Rats are various medium sized, long-tailed rodents of the Family Muroidea. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus....
, frog
Frog

Frogs are amphibians in the order Anura , formerly referred to as Salientia . The name frog derives from Old English language frogga, , cognate with Sanskrit plava , probably deriving from Proto-Indo-European language praw = "to jump"....
, and armadillo
Armadillo

Armadillos are small placental mammals, known for having a leathery Armour shell. The Dasypodidae are the only surviving family in the order Cingulata, part of the superorder Xenarthra along with the anteaters and sloths....
. Some migratory birds following the Mississippi Flyway
Mississippi Flyway

The Mississippi Flyway is a bird migration route that generally follows the Mississippi River in the United States and the Mackenzie River in Canada....
 spend part of the year in the vicinity.

Geology

The thermal springs are situated in the Ouachita Mountains of central Arkansas. The springs emerge in a gap between Hot Springs Mountain and West Mountain in an area about long by wide at altitudes from 576 to . The springs predominantly are composed of hot water from thousands of feet underground mixed with some shallow cold ground water. Currently, there are 43 thermal springs in the park that are presumed to be flowing. Thermal water from 33 of the thermal springs is collected and monitored at a central reservoir, which distributes the combined discharge for public use and consumption. Rock types in the area include shale
Shale

Shale is a fine-grained sedimentary rock whose original constituents were clay minerals or muds. It is characterized by thin laminae breaking with an irregular curving fracture, often splintery and usually parallel to the often-indistinguishable bedding plane....
 units which generally impede ground-water movement, while fractured chert
Chert

Chert is a fine-grained silica-rich microcrystalline, cryptocrystalline or microfibrous sedimentary rock that may contain small fossils. It varies greatly in color , but most often manifests as gray, brown, grayish brown and light green to rusty red; its color is an expression of trace elements present in the rock, and both red and green ar...
, novaculite
Novaculite

Novaculite is a form of chert or flint found in the Ouachita Mountains of Arkansas and Oklahoma and in the Marathon Uplift of Texas. Novaculite is considered to be geosyncline highly siliceous sediments and may be a product of the low-grade metamorphism of chert beds....
, and sandstone
Sandstone

Sandstone is a sedimentary rock composed mainly of sand-size mineral or rock Particle size . Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust ....
 units generally support ground-water movement.

The water comes from rain which falls in mountains to the north and northeast. Flowing downward through cracked rock at about one foot a year, the meteoric water migrates to estimated minimum depths of 4,500 to and achieves high temperatures in the deep section of the flow path before rising along fault and fracture conduits. Under artesian pressure, the thermal waters rise and emerge through the Hot Springs Sandstone between the traces of two thrust faults, along several northeast-trending lineaments. Some rainwater from near the springs mixes with the deep hot water before discharge. The trip down takes about 4,000 years while the hot water takes about a year to reach the surface.

The heat comes from the natural heating of rocks as depth increases. The composition of the water indicates it is heated rainwater which has not approached a magmatic source, so no volcanic action is involved in the formation of these hot springs. The result is the mildly alkaline, pleasant tasting solution with dissolved calcium carbonate.

Rock types


The exposed rock types in the vicinity of the thermal springs are sedimentary rocks of Mississippian to Ordovician
Ordovician

The Ordovician is a geologic period, the second of six of the Paleozoic era , and covers the time between 488.3?1.7 to 443.7?1.5 million years ago ....
 age, with the exception of younger igneous rocks (Cretaceous
Cretaceous

The Cretaceous , usually abbreviated K for its German translation Kreide, is a geologic period from circa to million years ago . In the geologic timescale, the Cretaceous follows on the Jurassic period and is followed by the Paleogene period....
 age) exposed in two small areas about 6 and southeast of the thermal springs (Potash Sulphur Spring and Magnet Cove
Magnet Cove igneous complex

The Magnet Cove igneous complex is a small Igneous rock#Chemical classification Ring dike lying to the west of the town of Magnet Cove, Arkansas in Hot Spring County, Arkansas....
, respectively), and in many very small dikes and sills. Most dikes are less than wide. There have been 80 dikes noted about southeast of Hot Springs, on and near the Ouachita River
Ouachita River

The Ouachita River is a 605-mile-long river that runs south and east through the United States states of Arkansas and Louisiana, joining the Red River just before the Red joins the Mississippi River....
. There is no indication that igneous rock occurs where the thermal springs discharge.

The sedimentary rocks in the vicinity of the thermal springs consist of shale, chert, novaculite, sandstone, and conglomerate.
  • The Stanley Shale is predominantly a clayey, thinly fissile, black to green shale, with large amounts of sandstone interbedded throughout the formation. The sandstone, when freshly exposed, is a hard, fine-grained, feldspathic, silty sandstone, but weathers easily to a soft, clayey porous material ranging from green to brown in color. Almost all of the low-lying areas in the city of Hot Springs are composed of the Stanley Shale, and it surrounds Hot Springs Mountain on the south, east, and west sides.
  • The Hot Springs Sandstone Member of the Stanley Shale, hereafter referred to as the Hot Springs Sandstone, consists of fine- to medium-grained sandstone with some shale and conglomerate. The sandstone is gray, hard and quartzitic, reaching thicknesses up to The shale predominantly occurs at the top of the unit, and the principal bed of the conglomerate occurs at the bottom.
  • The Arkansas Novaculite consists of lower, middle, and upper members. The lower member is a massive fractured novaculite, and is the dominant member on Hot Springs Mountain, with a thickness of about The middle member is a black clay shale interbedded with novaculite, about thick on Hot Springs Mountain. The upper member is chiefly a massive, highly calcareous light gray to black novaculite. It reaches a maximum thickness of in the area.
  • The Polk Creek Shale and Missouri Mountain Shale overlie the Bigfork Chert and generally consist of shale with minor thin layers of quartzitic sandstone. The Polk Creek Shale is a black, fissile, graphitic shale. The Missouri Mountain Shale varies in color, and is soft and argillaceous.
  • The Bigfork Chert overlies the Womble Shale and consists almost entirely of chert and silty chert in layers 2 to thick, separated by minor thin beds of black shale. The chert is very brittle and intensely fractured from folding.
  • The Womble Shale is the oldest geologic unit that underlies all other exposed units. It is black, hard, and argillaceous shale.


During most of the Paleozoic
Paleozoic

The Paleozoic or Palaeozoic Era is the earliest of three geology Era of the Phanerozoic Eon . The Paleozoic spanned from roughly , and is subdivided into six period ; from oldest to youngest they are: the Cambrian, Ordovician, Silurian, Devonian period, Carboniferous, and Permian...
 era, what became the Ouachita Mountains was the bottom of a shallow sea, where several sedimentary layers were created. About 500 million years ago a collision of the South American Plate
South American Plate

The South American Plate is a tectonic plate covering the continent of South America and extending eastward to the Mid-Atlantic Ridge.The easterly side is a divergent boundary with the African Plate forming the southern part of the Mid-Atlantic Ridge....
 with the North American Plate
North American Plate

The North American Plate is a tectonic plate covering most of North America, Greenland and part of Siberia. It extends eastward to the Mid-Atlantic Ridge and westward to the Chersky Range in eastern Siberia....
 caused the shale and sandstone layers to fracture and fissure, creating mountains of the folded rocks. The thermal springs emerge from the plunging crest line of a large overturned anticline in the Zigzag Mountains of the Ouachita anticlinorium. The overturned anticline plunges toward the southwest into the Mazarn Basin. There are two recognized major thrust fault
Thrust fault

A thrust fault is a type of Geologic fault, or break in the Earth's crust with resulting movement of each side against the other, in which a lower stratigraphic position is pushed up and over another....
s trending nearly parallel to fold axes that define the northern and southern limits of the thermal springs discharge area. The northern fault extends nearly parallel to Fountain Street northeastward about onto the southeast flank of North Mountain, and dips about 26 degrees north. At the northern extent of the thermal springs, this fault is suggested to form along the bedding contact of the Hot Springs Sandstone and Stanley Shale, with the Stanley Shale forming the hanging wall of the fault. The southern fault extends northeastward about roughly along the axis of the Hot Springs anticline, and dips about 44 degrees north. It has been proposed that a fault splits away from the southern fault, trends west and connects with the northern fault. A natural ravine trends along the location of this fault. Extensive cracks, joints, and fissures in the Bigfork Chert, Arkansas Novaculite, and the Hot Springs Sandstone allow the water to flow in the thermal springs area. Dissolved minerals in the water precipitate to form the white to tan travertine
Travertine

Travertine is a sedimentary rock. It is a natural chemical precipitation of carbonate minerals; typically aragonite, but often recrystallized to, or primarily, calcite....
 or "tufa rock
Tufa

Tufa is a soft, friable and porous calcite rock. It is a calcium carbonate deposit that forms by precipitation from bodies of water with a high dissolved calcium content....
" seen near the openings of the hot springs.

Composition of the water


The water all comes from the same deep source, but surface appearance of the springs differed. What was called Mud Spring had a tepid ooze where there was no danger of being scalded. Springs acquired names such as Magnesia, Big Iron, and Arsenic. Big Iron's water, with significant iron oxide, would precipitate ocherous crusts and stains. Arsenic Spring, on the other hand, contains no detectable traces of that substance. The water from many springs is now combined in one supply, with the total amount of water varying from 750,000 to 950,000 gallons a day. The temperature averages about 143°F (61°C). Maximum temperatures have declined about 5°F (3°C) since records have been kept.

In 1905 curative characteristics were being ascribed to radium
Radium

Radium is a radioactive chemical element which has the symbol Ra and atomic number 88. Its appearance is almost pure white, but it readily oxidizes on exposure to air, turning black....
 and Professor Bertram Boltwood
Bertram Boltwood

Bertram Borden Boltwood was an American pioneer of radiochemistry.He was a graduate of Yale University, and taught there 1897-1900. He measured the age of rocks by the Uranium-lead dating, in 1907....
 of Yale examined these waters. There is a measurable level of radioactivity primarily due to dissolved radon
Radon

Radon is a chemical element with symbol Rn and atomic number 86. Radon is a colorless, odorless, tasteless, naturally occurring, radioactive noble gas that is formed from the decay of radium....
 gas, with some radium. At the time collection and distribution equipment was designed to retain the radon gas, while now it is designed to allow it to escape. The level of exposure to radiation that results from bathing appears to be similar to the level that would result from sitting in the sun for the same period of time. The park water is considered well within safe limits and similar to other natural waters throughout the world.

Drinking water is dispensed from several hot water jug fountains. The hot water is naturally potable. Two cold water springs (Happy Hollow and Whittington Springs) are treated using ozone filtration. Regulations prohibit private individuals from selling the park's waters.
Chemical Parts per million
Bicarbonate (HCO3) 130.0
Silica (SiO2) 53.0
Calcium (Ca) 47.0
Free Carbon Dioxide (CO2) 9.7
Sulfate (SO4) 7.8
Oxygen (O2) 4.5
Magnesium (Mg) 4.9
Chloride (Cl) 2.2
Sodium (Na) 4.0
Potassium (K) 1.4
Fluoride (F) 0.26


External links

  • Official site: