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Pennyroyal Plain
The Pennyroyal Plateau or Pennyroyal Region, often spelled Pennyrile, is a large physiographic region of Kentucky that features rolling hills, caves, and karst topography in general. It is named for ''Hedeoma pulegioides'' (the American pennyroyal), a wild mint that grows in the area. It is also called the "Mississippian Plateau," for the Mississippian geologic age in which it was formed. The Pennyroyal is bordered by the Pottsville Escarpment in the east. The Pottsville Escarpment is the transition zone from the central part of Kentucky to the higher and geologically younger Cumberland Plateau in the eastern part of the state. The Pennyroyal is bordered on the north by Muldraugh Hill, the geological escarpment that forms the transition from the geologically older Bluegrass to the Pennyroyal. This is a series of knobs and ridges based on hard siltstones. The Pennyroyal is bordered on the west by the younger Jackson Purchase. The Pennyroyal is often thought by non-geologists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Kentucky Coal Field
The West Kentucky Coal Field, alternatively The North Pennyrile or simply Northwest Kentucky, comprises an area in the west-central and northwestern part of the state, bounded by the Dripping Springs Escarpment and the Pennyroyal Plateau and the Ohio River, but is part of the Illinois Basin that extends into Indiana and Illinois. It is characterized by Pennsylvanian age sandstones, shales and coal. In a recent effort to distinguish itself from its coal mining past, which in the last 10 years has all but completely disappeared by 2024 with only a scant few mines still operating, the area now usually refers to itself as the Green River Valley since around 2002, named for the Green River, a southern tributary that flows through every county in the region except Union and Hancock. Most regional businesses and many government services use either Green River Valley or simply Green River in their name. Nearly, all of the counties in the area are part of the television market known as th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regions Of Kentucky
Kentucky (, ), officially the Commonwealth of Kentucky, is a landlocked state in the Southeastern region of the United States. It borders Illinois, Indiana, and Ohio to the north, West Virginia to the northeast, Virginia to the east, Tennessee to the south, and Missouri to the west. Its northern border is defined by the Ohio River. Its capital is Frankfort and its most populous city is Louisville. As of 2024, the state's population was approximately 4.6 million. Previously part of colonial Virginia, Kentucky was admitted into the Union as the fifteenth state on June 1, 1792. It is known as the "Bluegrass State" in reference to Kentucky bluegrass, a species of grass introduced by European settlers which has long supported the state's thoroughbred horse industry. The fertile soil in the central and western parts of the state led to the development of large tobacco plantations similar to those in Virginia and North Carolina, which utilized enslaved labor prior to the passa ... [...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] |
Limestone
Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science), crystal forms of calcium carbonate . Limestone forms when these minerals Precipitation (chemistry), precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly Dolomite (rock), dolomite, a closely related rock, which contains a high percentage of the mineral Dolomite (mine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Indiana
Southern Indiana is a geographic and cultural region that generally comprises the southern third of the U.S. state of Indiana and borders the states of Illinois to the west, Kentucky to the south, and Ohio to the east. Spanning the state's southernmost 33 counties, its main population centers include Southwestern Indiana (anchored by the city of Evansville), the Louisville metropolitan area (south), and the Cincinnati metropolitan area (southeast). The region's history and geography have led to a blending of Southern and Midwestern cultures, distinct from the rest of the state. It is often considered to be part of the Upland South and the Southern influenced Lower Midwest. The Wabash forms the region's western boundary and Ohio forms the region's entire southern and the majority of its eastern boundary. Elevation ranges from around above mean sea level at the rivers' confluence to at the highest point in the Knobstone Escarpment. Southern Indiana's topography is conside ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indiana Uplands
The Indiana Uplands or the Hoosier Uplands are a geographical region in south-central Indiana. On a topographical map the Indiana Uplands begin slightly north of the city of Martinsville, Indiana and continue south to the Ohio River. The description of the region inspired the name of Upland Brewing Company. The region's approximate boundaries are Interstate 65 to the east and U.S. Route 231 to the west. The Uplands are characterized by terrain varying from rolling hills to cliffs, sharp rugged hills and valleys. Nearly all of these hills are composed of sandstone, limestone, and siltstone from West to east. The siltstone hills are the most rugged followed by the sandstone while the limestone are the smoothest. This is contrast to the Tipton Till Plain immediately to the north in central Indiana, which features flat to gently rolling landscape. Interstates 64 and 69 pass through this rugged section of the state with sections of both cut deep into the rock and others towering o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Tennessee
Middle Tennessee is one of the three Grand Divisions of Tennessee that composes roughly the central portion of the state. It is delineated according to state law as 41 of the state's 95 counties. Middle Tennessee contains the state's capital and largest city, Nashville, as well as Clarksville, the state's fifth largest city, and Murfreesboro, the state's sixth largest city and largest suburb of Nashville. The Nashville metropolitan area, located entirely within the region, is the most populous metropolitan area in the state, and the Clarksville metropolitan area is the state's sixth most populous. Middle Tennessee is both the largest, in terms of land area, and the most populous of the state's three Grand Divisions. Geographically, Middle Tennessee is composed of the Highland Rim, which completely surrounds the Nashville Basin. The Cumberland Plateau is located in the eastern part of the region. Culturally, Middle Tennessee is considered part of the Upland South. Commodi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Highland Rim
The Highland Rim is a geographic term for the area in Tennessee, North Alabama, and Kentucky which surrounds the Central Basin. The Central Basin is a geological dome which has subsequently fractured and eroded to produce a basin. The Highland Rim is a cuesta surrounding the basin, and the border where the difference in elevation is sharply pronounced is an escarpment. Ther feature continues well into Southern Indiana even up as far as Central Indiana as the Indiana Uplands. Geology and physiography The Highland Rim is a physiographic section of the larger Interior Low Plateaus province, which in turn is part of the larger Interior Plains physiographic division. Most of the Highland Rim is located in U.S. EPA Ecoregion 71, Interior Plateau, which is a part of the Eastern Temperate Forest. The sections of the Highland Rim are referred to the four cardinal directions, e.g., "Northern Highland Rim", etc. The Highland Rim is rather continuous and any division of it, including ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bitumen
Bitumen ( , ) is an immensely viscosity, viscous constituent of petroleum. Depending on its exact composition, it can be a sticky, black liquid or an apparently solid mass that behaves as a liquid over very large time scales. In American English, the material is commonly referred to as asphalt or tar. Whether found in natural deposits or refined from petroleum, the substance is classed as a pitch (resin), pitch. Prior to the 20th century, the term asphaltum was in general use. The word derives from the Ancient Greek word (), which referred to natural bitumen or pitch. The largest natural deposit of bitumen in the world is the Pitch Lake of southwest Trinidad, which is estimated to contain 10 million tons. About 70% of annual bitumen production is destined for road surface, road construction, its primary use. In this application, bitumen is used to bind construction aggregate, aggregate particles like gravel and forms a substance referred to as asphalt concrete, which is collo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Illinois Basin
The Illinois Basin is a Paleozoic depositional and structural basin in the United States, centered in and underlying most of the state of Illinois, and extending into southwestern Indiana and western Kentucky. The basin is elongate, extending approximately northwest-southeast, and southwest-northeast. Boundaries and sedimentary rocks The basin is bordered on the northeast by the Kankakee Arch, on the southeast by the Cincinnati Arch, on the south by the Pascola Arch, on the southwest by the Ozark Dome, on the northwest by the Mississippi River Arch, and on the north by the Wisconsin Arch. The New Madrid seismic zone and the Wabash Valley seismic zone intersect the southern portion of the basin. The major structural features within the basin include the La Salle anticlinal belt, the DuQuoin monocline, the Cottage Grove fault system, and the Fairfield Basin. At its center beneath southern Illinois, the basin contains a thickness of about 15,000 feet of Cambrian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvanian (geology)
The Pennsylvanian ( , also known as Upper Carboniferous or Late Carboniferous) is, on the International Commission on Stratigraphy, ICS geologic timescale, the younger of two period (geology), subperiods of the Carboniferous Period (or the upper of two system (stratigraphy), subsystems of the Carboniferous System). It lasted from roughly . As with most other geochronology, geochronologic units, the stratum, rock beds that define the Pennsylvanian are well identified, but the exact date of the start and end are uncertain by a few hundred thousand years. The Pennsylvanian is named after the U.S. state of Pennsylvania, where the coal Bed (geology), beds of this age are widespread. The division between Pennsylvanian and Mississippian (geology), Mississippian comes from North American stratigraphy. In North America, where the early Carboniferous beds are primarily marine limestones, the Pennsylvanian was in the past treated as a full-fledged geologic period between the Mississippian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
