|
Fisher Ridge Cave System
The Fisher Ridge Cave System is a cave system located in Hart County, Kentucky, United States, near Mammoth Cave National Park. As of November 2019 it had been mapped to a length of , making it the fifth-longest cave in the United States and the tenth-longest in the world. Discovery The earliest visitors to the Fisher Ridge Cave System were Archaic Native Americans who explored the cave. They scratched a lattice or checkerboard pattern onto a large breakdown boulder. Pieces of charcoal from a cane torch dated to approximately 3000 BCE and footprints were also found in the cave. Prehistoric explorers of the cave likely used a different entrance from the ones that are known now, particularly given that the only known natural entrance to the cave is a low wet crawl, but it is not clear which entrance may have been used and it may no longer exist. The cave was rediscovered in January 1981 by a group of Michigan cavers. The group had originally intended a trip to Crump Spring Cav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hart County, Kentucky
Hart County is a county located in the south central portion of the Commonwealth of Kentucky. As of the 2020 census, the population was 19,288. Its county seat is Munfordville, its largest city is Horse Cave. Hart County is a prohibition or dry county. History Hart County was formed in 1819 from portions of Hardin and Barren counties. The county is named for Captain Nathaniel G. S. Hart, a Kentucky militia officer in the War of 1812 who was wounded at the Battle of Frenchtown and died in the Massacre of the River Raisin. The Battle of Munfordville, a Confederate victory, was fought in the county in 1862, during the American Civil War. A courthouse fire in January 1928 resulted in the loss of some county records. In 1989 the Amish settlement near Munfordville was founded. It has ties to the Geauga Amish settlement in Ohio, from where many of the Munfordville Amish came. It is the fastest growing Amish settlement in America and had 14 church districts and a total p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Table
The water table is the upper surface of the phreatic zone or zone of saturation. The zone of saturation is where the pores and fractures of the ground are saturated with groundwater, which may be fresh, saline, or brackish, depending on the locality. It can also be simply explained as the depth below which the ground is saturated. The portion above the water table is the vadose zone. It may be visualized as the "surface" of the subsurface materials that are saturated with groundwater in a given vicinity. In coarse soils, the water table settles at the surface where the water Hydraulic head, pressure head is equal to the atmospheric pressure (where gauge pressure = 0). In soils where capillary action is strong, the water table is pulled upward, forming a capillary fringe. The groundwater may be from precipitation or from more distant groundwater flowing into the aquifer. In areas with sufficient precipitation, water infiltrates through pore spaces in the soil, passing through t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caves Of Kentucky
Caves or caverns are natural voids under the Earth's surface. Caves often form by the weathering of rock and often extend deep underground. Exogene caves are smaller openings that extend a relatively short distance underground (such as rock shelters). Caves which extend further underground than the opening is wide are called endogene caves. Speleology is the science of exploration and study of all aspects of caves and the cave environment. Visiting or exploring caves for recreation may be called ''caving'', ''potholing'', or ''spelunking''. Formation types The formation and development of caves is known as ''speleogenesis''; it can occur over the course of millions of years. Caves can range widely in size, and are formed by various geological processes. These may involve a combination of chemical processes, erosion by water, tectonic forces, microorganisms, pressure, and atmospheric influences. Isotopic dating techniques can be applied to cave sediments, to determine the time ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Longest Caves In The United States ...
The following is a list of the longest caves in the United States per length (over ) of documented passageways. Many passageways are still being discovered; this list is based on the latest verifiable data. Some caves and cave systems are partially accessible to the general public. Other caves have restricted access; restrictions may include limiting access to experienced spelunkers or scientific research teams. See also *List of caves *List of longest caves *List of deepest caves References External links *USA Long caves by state {{DEFAULTSORT:Longest caves in the United States Lists of caves of the United States, *Longest Caves Caves or caverns are natural voids under the Earth's surface. Caves often form by the weathering of rock and often extend deep underground. Exogene caves are smaller openings that extend a relatively short distance underground (such as rock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Caves In The United States
This is a list of natural caves in the United States. Alabama * Cathedral Caverns * Crystal Cavern * DeSoto Caverns * Dust Cave * Fern Cave * Manitou Cave * Rickwood Caverns * Russell Cave * Sauta Cave * Shelta Cave Alaska * On Your Knees Cave * Trail Creek Caves Arizona * Antelope Cave * Bat Cave mine * Cave of the Bells * Colossal Cave * Coronado Cave * Grand Canyon Caverns * Kartchner Caverns * Lava River Cave * Onyx Cave * Peppersauce Cave * Skeleton Cave * Ventana Cave Arkansas * Blanchard Springs Caverns * Bull Shoals Caverns * Cosmic Cavern * Fitton Cave * Logan Cave * Crystal Dome Cavern * Mystic Caverns * Old Spanish Treasure Cave * Onyx Cave * Wonderland Cave California * Black Chasm Cavern * Boyden Cave *Burro Flats Painted Cave * California Caverns * Chumash Painted Cave * Crystal Cave * Hall City Cave * Infernal Caverns * Lake Shasta Caverns * Lava Beds National Monument * Mercer Caverns * Mitchell Caverns * Moaning Cavern * Mud Caves *Ursa Minor Colora ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surveying
Surveying or land surveying is the technique, profession, art, and science of determining the land, terrestrial Plane (mathematics), two-dimensional or Three-dimensional space#In Euclidean geometry, three-dimensional positions of Point (geometry), points and the Euclidean distance, distances and angles between them. These points are usually on the surface of the Earth, and they are often used to establish maps and boundaries for ownership, locations, such as the designated positions of structural components for construction or the surface location of subsurface features, or other purposes required by government or civil law, such as property sales. A professional in land surveying is called a land surveyor. Surveyors work with elements of geodesy, geometry, trigonometry, regression analysis, physics, engineering, metrology, programming languages, and the law. They use equipment, such as total stations, robotic total stations, theodolites, Satellite navigation, GNSS receivers, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erosion
Erosion is the action of surface processes (such as Surface runoff, water flow or wind) that removes soil, Rock (geology), rock, or dissolved material from one location on the Earth's crust#Crust, Earth's crust and then sediment transport, transports it to another location where it is deposit (geology), deposited. Erosion is distinct from weathering which involves no movement. Removal of rock or soil as clastic sediment is referred to as ''physical'' or ''mechanical'' erosion; this contrasts with ''chemical'' erosion, where soil or rock material is removed from an area by Solvation, dissolution. Eroded sediment or solutes may be transported just a few millimetres, or for thousands of kilometres. Agents of erosion include rainfall; bedrock wear in rivers; coastal erosion by the sea and Wind wave, waves; glacier, glacial Plucking (glaciation), plucking, Abrasion (geology), abrasion, and scour; areal flooding; Aeolian processes, wind abrasion; groundwater processes; and Mass wastin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green River (Kentucky)
The Green River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map , accessed June 13, 2011 tributary of the Ohio River that rises in Lincoln County in south central Kentucky. Tributaries of the Green River include the Barren River, the Nolin River, the Pond River and the Rough River. The river was named after Nathanael Greene, a general of the American Revolutionary War. Route The river rises from south of Miracle, Kentucky in central Lincoln County, and follows a meandering path, collecting several smaller streams along its way to its impoundment by a dam at Green River Lake near Campbellsville. It then continues in a westerly direction and is joined by the Little Barren River before entering the Mammoth Cave National Park. At the western end of the park, it receives the tributary Nolin River which exits Nolin River Lake. Then continuing westward it is joined by the Barren River. It then takes a more northwester ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammoth Cave
Mammoth Cave National Park is a List of national parks of the United States, national park of the United States in south-central Kentucky. It encompasses portions of Mammoth Cave, the List of longest caves, longest known cave system in the world. The park's are located primarily in Edmonson County, Kentucky, Edmonson County, with small areas extending eastward into Hart County, Kentucky, Hart and Barren County, Kentucky, Barren counties. The Green River (Kentucky), Green River runs through the park, with a tributary called the Nolin River feeding into the Green just inside the park. The cave system has formally been known as the Mammoth–Flint Ridge Cave System since 1972, when a connection was discovered between Mammoth Cave and the even longer system under Flint Ridge to the north. As of 2022, more than of passageways had been surveyed, over 1.5 times longer than the second-longest cave system, Mexico's Sistema Sac Actun, Sac Actun underwater cave. The park was established ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Speleological Society
The National Speleological Society (NSS) is an organization formed in 1941 to advance the exploration, conservation, study, and understanding of caves in the United States. Originally headquartered in Washington D.C., its current offices are in Huntsville, Alabama Huntsville is the List of municipalities in Alabama, most populous city in the U.S. state of Alabama. The population of the city is estimated to be 241,114 in 2024, making it the List of United States cities by population, 100th-most populous .... The organization engages in the research and scientific study, restoration, exploration, and protection of caves. It has more than 10,000 members in more than 250 grottos. Since 1974 there has been a cave diving section of the society. History The Speleological Society of the District of Columbia (SSDC) was formed on May 6, 1939 by Bill Stephenson. In the fall of 1940, the officers of the SSDC drafted a proposed constitution that would transform the SSDC into the Na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States asserts sovereignty over five Territories of the United States, major island territories and United States Minor Outlying Islands, various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's List of countries and dependencies by area, third-largest land area and List of countries and dependencies by population, third-largest population, exceeding 340 million. Its three Metropolitan statistical areas by population, largest metropolitan areas are New York metropolitan area, New York, Greater Los Angeles, Los Angel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torch
A torch is a stick with combustible material at one end which can be used as a light source or to set something on fire. Torches have been used throughout history and are still used in processions, symbolic and religious events, and in juggling and entertainment. In some countries, notably the United Kingdom and Australia, "torch" in modern usage is also the term for a battery-operated portable light. Etymology From the Old French "''torche''" meaning "twisted thing", hence "torch formed of twisted tow dipped in wax", probably from Vulgar Latin *''torca'', alteration of Late Latin ''torqua'', variant of classical Latin ''torques'' "collar of twisted metal", from ''torquere'' "to twist". Torch construction Torch construction has varied through history depending on the torch's purpose. Torches were usually constructed of a wooden stave with one end wrapped in a material which was soaked in a flammable substance. In the United States, black bear bones may have been used. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
