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Cowpasture River
The Cowpasture River is a chief tributary of the James River in western Virginia in the United States. It is long.U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed April 1, 2011 Course The Cowpasture rises in northeastern Highland County and flows generally southwestwardly, initially between Bullpasture Mountain and Shaws Ridge through a narrow valley floor near the George Washington National Forest. It is joined in eastern Highland County by Shaws Fork and gains breadth but has little depth. At Summers Mountain (a high point along Bullpasture Mountain) the river passes through a narrow gorge before entering a broad valley in Bath County, where at the community of Williamsville it collects the Bullpasture River, which greatly adds to its volume. For from this confluence the Cowpasture is joined by many small streams, and flows in increasingly wide bends in eastern Bath County. Downstream of the community of Millbo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botetourt County, Virginia
Botetourt County ( ) is a US county that lies in the Roanoke Region of the Commonwealth of Virginia. Located in the mountainous portion of the state, the county is bordered by two major ranges, the Blue Ridge Mountains and the Appalachian Mountains. Botetourt County was created in 1770 from part of Augusta County and was named for Norborne Berkeley, known as Lord Botetourt. It originally comprised a vast area, which included the southern portion of present-day West Virginia and all of Kentucky. Portions were set off to form new counties beginning in 1772, until the current borders were established in 1851. Botetourt County is part of the Roanoke Virginia Metropolitan Statistical Area, and the county seat is the town of Fincastle. As of the 2020 census, the county population was 33,596. History First proposed in the House of Burgesses in 1767, Botetourt County was created in 1770 from Augusta County. The county is named for Norborne Berkeley, Baron de Botetourt, more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Virginia Rivers
This is a list of rivers in the U.S. state of Virginia. By drainage basin This list is arranged by drainage basin, with respective tributaries, arranged in the order of their confluence from mouth to source, indented under each larger stream's name. Atlantic Ocean north of Chesapeake Bay * Cockle Creek *Machipongo River Chesapeake Bay *Pocomoke River *Potomac River ** Hull Creek **Coan River **Yeocomico River ***Northwest Yeocomico River ***South Yeocomico River *** West Yeocomico River **Lower Machodoc Creek ** Nomini Creek ** Popes Creek **Mattox Creek ** Rosier Creek **Upper Machodoc Creek **Potomac Creek ***Accokeek Creek **Aquia Creek **Chopawamsic Creek **Quantico Creek **Neabsco Creek **Occoquan River *** Bull Run ****Popes Head Creek ****Cub Run ****Little Bull Run *** Cedar Run *** Broad Run **** Kettle Run **Pohick Creek **Accotink Creek **Dogue Creek **Little Hunting Creek **Hunting Creek ***Cameron Run **** Holmes Run **Four Mile Run *** Lubber Run **Pimmit Run **Diff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North American River Otter
The North American river otter (''Lontra canadensis''), also known as the northern river otter and river otter, is a semiaquatic mammal that only lives on the North American continent, along its waterways and coasts. An adult North American river otter can weigh between . The river otter is protected and insulated by a thick, water-repellent coat of fur. The North American river otter, a member of the subfamily Lutrinae in the weasel family (Mustelidae), is equally versatile in the water and on land. It establishes a burrow close to the water's edge in river, lake, swamp, coastal shoreline, tidal flat, or estuary ecosystems. The den typically has many tunnel openings, one of which generally allows the otter to enter and exit the body of water. Female North American river otters give birth in these burrows, producing litters of one to six young. North American river otters, like most predators, prey upon the most readily accessible species. Fish is a favored food among the ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bald Eagle
The bald eagle (''Haliaeetus leucocephalus'') is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with the white-tailed eagle (''Haliaeetus albicilla''), which occupies the same niche as the bald eagle in the Palearctic. Its range includes most of Canada and Alaska, all of the contiguous United States, and northern Mexico. It is found near large bodies of open water with an abundant food supply and old-growth trees for nesting. The bald eagle is an opportunistic feeder which subsists mainly on fish, which it swoops down upon and snatches from the water with its talons. It builds the largest nest of any North American bird and the largest tree nests ever recorded for any animal species, up to deep, wide, and in weight. Sexual maturity is attained at the age of four to five years. Bald eagles are not actually bald; the name derives from an older meaning of the word, "white headed". The adult is mainly brown with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cave
A cave or cavern is a natural void in the ground, specifically a space large enough for a human to enter. Caves often form by the weathering of rock and often extend deep underground. The word ''cave'' can refer to smaller openings such as sea caves, rock shelters, and grottos, that extend a relatively short distance into the rock and they are called ''exogene'' caves. 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, microorgan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinkhole
A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are locally also known as ''vrtače'' and shakeholes, and to openings where surface water enters into underground passages known as '' ponor'', swallow hole or swallet. A '' cenote'' is a type of sinkhole that exposes groundwater underneath. A ''sink'' or ''stream sink'' are more general terms for sites that drain surface water, possibly by infiltration into sediment or crumbled rock. Most sinkholes are caused by karst processes – the chemical dissolution of carbonate rocks, collapse or suffosion processes. Sinkholes are usually circular and vary in size from tens to hundreds of meters both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may form gradually or suddenly, and are found worldwide. Formation Natural processes Sinkholes may capture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals 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, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for lime ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shale
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite.Blatt, Harvey and Robert J. Tracy (1996) ''Petrology: Igneous, Sedimentary and Metamorphic'', 2nd ed., Freeman, pp. 281–292 Shale is characterized by its tendency to split into thin layers ( laminae) less than one centimeter in thickness. This property is called '' fissility''. Shale is the most common sedimentary rock. The term ''shale'' is sometimes applied more broadly, as essentially a synonym for mudrock, rather than in the more narrow sense of clay-rich fissile mudrock. Texture Shale typically exhibits varying degrees of fissility. Because of the parallel orientation of clay mineral flakes in shale, it breaks into thin layers, often splintery and usually parallel to the otherwise indistinguishable bed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ridge-and-Valley Appalachians
The Ridge-and-Valley Appalachians, also called the Ridge and Valley Province or the Valley and Ridge Appalachians, are a physiographic province of the larger Appalachian division and are also a belt within the Appalachian Mountains extending from southeastern New York in the north through northwestern New Jersey, westward into Pennsylvania through the Lehigh Valley, and southward into Maryland, West Virginia, Virginia, Kentucky, Tennessee, Georgia, and Alabama. They form a broad arc between the Blue Ridge Mountains and the Appalachian Plateau physiographic province (the Allegheny and Cumberland plateaus). They are characterized by long, even ridges, with long, continuous valleys in between. The river valleys were areas of indigenous settlements for thousands of years. In the historic period, the Cherokee people had towns along many of the rivers in western South Carolina and North Carolina, as well as on the western side of the Appalachian Mountains in present- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calfpasture River
The Calfpasture River is a river in the U.S. state of Virginia. It flows about from its source, Gordons Peak in the Allegheny Mountains, to its confluence with the Little Calfpasture River, forming the Maury River. Via the Maury, the Calfpasture's waters flow into the James River, thence Chesapeake Bay and the Atlantic Ocean. According to the U.S. Board on Geographic Names, variant names of the Calfpasture River include the Big Calfpasture River, Calf Pasture River, Great Calfpasture River, and North River. Course The Calfpasture River originates on the slopes of Gordons Peak, in Augusta County, near Shenandoah Mountain, in George Washington National Forest. Its headwater tributaries drain Bald Ridge. The river flows generally southwest for most of its course. The tributary Braley Branch joins just before the Calfpasture River flows by the small settlement of West Augusta. U.S. Route 250 crosses the river at West Augusta. Continuing southwest, the river is joined by West Dry Bra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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