|
Ozark Highlands
The Ozark Highlands is a List of ecoregions in the United States (EPA), Level III ecoregion designated by the United States Environmental Protection Agency, Environmental Protection Agency (EPA) in four U.S. states. Most of the region is within Missouri, with a part in Arkansas and small sections in Oklahoma and Kansas. It is the largest subdivision of the region known as the Ozark Mountains, less rugged in comparison to the Boston Mountains in Arkansas, the highest part of the Ozarks. The Ozark Highlands ecoregion has been subdivided into eleven List of ecoregions in the United States (EPA), Level IV ecoregions, seven of which lie completely within Missouri. Level IV ecoregions Springfield Plateau (39a) The Springfield Plateau is the only Ozark Highland Level IV ecoregion within all four states. The nearly level to rolling Springfield Plateau is underlain by cherty limestone of the Mississippian Boone Formation and Burlington Limestone; it is less rugged and wooded than Ecoregio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolomite (rock)
Dolomite (also known as dolomite rock, dolostone or dolomitic rock) is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg(CO3)2. It occurs widely, often in association with limestone and evaporites, though it is less abundant than limestone and rare in Cenozoic rock beds (beds less than about 66 million years in age). The first geologist to distinguish dolomite rock from limestone was Belsazar Hacquet in 1778. Most dolomite was formed as a magnesium replacement of limestone or of lime mud before lithification. The geological process of conversion of calcite to dolomite is known as dolomitization and any intermediate product is known as dolomitic limestone. The "dolomite problem" refers to the vast worldwide depositions of dolomite in the past geologic record in contrast to the limited amounts of dolomite formed in modern times. Recent research has revealed sulfate-reducing bacteria living in anoxic conditions precipitate dolomite which ind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beaver Lake (Arkansas)
Beaver Lake is a man-made reservoir in the Ozark Mountains of Northwest Arkansas and is formed by a dam across the White River. Beaver Lake has some of shoreline. With towering limestone bluffs, natural caves, and a wide variety of trees and flowering shrubs, it is a popular tourist destination. Beaver Lake is the source of drinking water in Northwest Arkansas, which is managed, treated and sold by Beaver Water District. Beaver Dam Beaver Dam was authorized by the Flood Control Act of 1944 and other following acts. The United States Army Corps of Engineers constructed Beaver Dam during the years 1960-1966, impounding a major part of the White River and creating Beaver Lake and flooding much of the valley including the remains of the historic resort town Monte Ne. The dam is located northwest of Eureka Springs, Arkansas. Construction of the powerhouse and switch yard began in 1963. Power generation began in May 1965 and continues today. The initial cost of the project was $6 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Norfork
Norfork Dam is a large dam in northern Arkansas southeast of Mountain Home. It dams North Fork River and creates Norfork Lake. The top of the dam supports a 2-lane roadway, part of AR 177. History In the late 1930s, before construction of the Norfork Dam had begun, the local economy of Baxter County, Arkansas was deteriorating. The yearly per capita income had fallen to between one-hundred and two-hundred dollars, and in 1940 alone more than six hundred small farms were abandoned. Those who remained looked forward with enthusiasm to any solution that promised relief from their economic problems. Mountain Home, Arkansas, then the largest community, was described as having no prospect for new business and very few paved roads. When construction of the dam finally began in the spring of 1941 it was said that, "before the first shovel of dirt was thrown, or the first tree dozed down, the Mountain Home people knew that a new era had dawned" United States, History of the Corps ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bull Shoals Lake
Bull Shoals Lake is an artificial lake or reservoir in the Ozark Mountains of northern Arkansas and southern Missouri. It has hundreds of miles of lake arms and coves, and common activities include boating, water sports, swimming, and fishing. Nineteen developed parks around the shoreline provide campgrounds, boat launches, swim areas, and marinas. History Bull Shoals Dam was created to impound the White River by one of the largest concrete dams in the United States and the 5th largest dam in the world at its inception. Work on the dam began in 1947, was completed in 1951 and dedicated by President Harry S. Truman in 1952. At least seven small family cemeteries and 20 larger cemeteries were meticulously relocated to accommodate the new lake. Recent national events include Brostock 2010 and 2011 and the TBF Bass Federation and Bassmaster Elite Series Tournaments in 2012. Hydrology Bull Shoals Lake impounds the White River for the last time as water travels toward its mouth on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Table Rock Lake
Table Rock Lake is an artificial lake or reservoir in the Ozarks of southwestern Missouri and northwestern Arkansas in the United States. Designed, built and operated by the U.S. Army Corps of Engineers, the lake is impounded by Table Rock Dam (located ), which was constructed from 1954 to 1958 on the White River. The lake is a popular attraction for the city of Branson, Missouri, and the nearby town of Shell Knob, Missouri. There are several commercial marinas along the lake, and Table Rock State Park is located on the east side, both north and south of Table Rock Dam. Downstream from the dam, the Missouri Department of Conservation operates a fish hatchery, which is used to stock trout in Lake Taneycomo, which begins immediately downstream from the Table Rock Dam. The cold water discharged from the dam creates a trout fishing environment in the lake. The lake derives its name from a rock formation resembling a table at the small community of Table Rock, Missouri, on Highw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White River (Arkansas)
White River may refer to: Bodies of water Africa * Bakoy River, in West Africa, called the White River over a portion of its length Canada * White River (British Columbia) * White River (Vancouver Island), a river in the Discovery Passage–Johnstone Strait watersheds of British Columbia ** White River Provincial Park * White River (Nass River), a river in the Marcus Passage watershed of British Columbia * White River (Quebec) * White River (Yukon) The White River (french: Rivière Blanche) ( Hän: ''Tadzan ndek'') is a tributary about long, of the Yukon River in the U.S. state of Alaska and the Canadian territory of Yukon. The Alaska Highway [Baidu] |
Shortleaf Pine
''Pinus echinata'', the shortleaf pine, is a species of pine native to the southeastern United States. Description The tree is variable in form, sometimes straight, sometimes crooked, with an irregular crown. The tree reaches heights of with a trunk diameter of . The leaves are needle-like, in fascicles (bundles) of two and three mixed together, and from long. The cones are long, with thin scales with a transverse keel and a short prickle. They open at maturity but are persistent. Shortleaf pine seedlings develop a persistent J-shaped crook near the ground surface. Axillary and other buds form near the crook and initiate growth if the upper stem is killed by fire or is severed. The bark has resin pockets, which form small depressions, less than in diameter. This feature can be used to distinguish ''P. echinata'' from all other ''Pinus'' species within its native range. Taxonomy The Latin specific epithet of ''echinata'' refers to hedgehog, from ''echinus''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chert
Chert () is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is characteristically of biological origin, but may also occur inorganically as a precipitation (chemistry), chemical precipitate or a diagenesis, diagenetic replacement, as in petrified wood. Chert is typically composed of the petrified remains of siliceous ooze, the biogenic sediment that covers large areas of the deep ocean floor, and which contains the silicon skeletal remains of diatoms, Dictyochales, silicoflagellates, and radiolarians. Precambrian cherts are notable for the presence of fossil cyanobacteria. In addition to Micropaleontology, microfossils, chert occasionally contains macrofossils. However, some chert is devoid of any fossils. Chert varies greatly in color (from white to black), but most often manifests as gray, brown, grayish brown and light green to rusty redW.L. Roberts, T.J. Campbell, G.R. Rapp Jr. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tallgrass Prairie
The tallgrass prairie is an ecosystem native to central North America. Historically, natural and anthropogenic fire, as well as grazing by large mammals (primarily bison) provided periodic disturbances to these ecosystems, limiting the encroachment of trees, recycling soil nutrients, and facilitating seed dispersal and germination. Prior to widespread use of the steel plow, which enabled large scale conversion to agricultural land use, tallgrass prairies extended throughout the American Midwest and smaller portions of southern central Canada, from the transitional ecotones out of eastern North American forests, west to a climatic threshold based on precipitation and soils, to the southern reaches of the Flint Hills in Oklahoma, to a transition into forest in Manitoba. They were characteristically found in the central forest-grasslands transition, the central tall grasslands, the upper Midwest forest-savanna transition, and the northern tall grasslands ecoregions. They flouris ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oak–hickory Forest
Oak–hickory forest is a type of North American forest ecosystem, and an ecoregion of the Temperate broadleaf and mixed forests Biome. Geography It has a range extending from Rhode Island and southern New York, west to Iowa, and south to Northern Georgia. Smaller, isolated oak–hickory communities can also be found as far west as North Dakota, south in Florida and in northeast Texas, and north to southern Maine and Ontario. They can also be found in Pennsylvania west to Illinois. Dominated by nut-bearing oak and hickory species of trees, the oak–hickory forest has the largest range of any deciduous forest ecosystem in eastern and central North America. Natural history The current oak–hickory forest includes the former range of the oak–chestnut forest region, which encompassed the northeast portion of the current oak–hickory range. When the American chestnut population succumbed to invasive fungal blight in the early 20th century, those forests shifted to an oak and hicko ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
