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Laurel Hill (Pennsylvania)
Laurel Hill, also known as Laurel Ridge or Laurel Mountain, is a mountain that is located in Pennsylvania's Allegheny Mountains. This ridge is flanked by Negro Mountain to its east and Chestnut Ridge to its west. The mountain is home to six state parks: Laurel Ridge State Park, Laurel Mountain State Park, Linn Run State Park, Kooser State Park, Laurel Hill State Park, and Ohiopyle State Park. The Laurel Highlands Hiking Trail runs the length of the ridge. History and notable features In August of 1774, governor of Virginia John Murray, 4th Earl of Dunmore issued the following proclamation: “ ..whereas the Province of Pennsylvania has unduly laid claim to … His Majesty’s territory…. I do hereby in His Majesty’s name require & command all of His Majesty’s subjects West of Laurel Hill to pay a due respect to my Proclamation, strictly prohibiting the authority of Pennsylvania at their peril.�">[1/nowiki> Two state forests, comprising over , are located on Lau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kentuck Knob
Kentuck Knob (also known as the Hagan House) is a house in Stewart Township, near the village of Chalkhill, in Fayette County, Pennsylvania, United States. Designed by the architect Frank Lloyd Wright in the Usonian style, the residence was developed for I. N. Hagan, the owner of a local ice-cream firm, along with his wife Bernardine. It is built on the southern slope of a knoll known as Kentuck Knob, overlooking the Youghiogheny River gorge. The name of the house and knoll is derived from an 18th-century settler who was planning to move to Kentucky. The house is designated as a National Historic Landmark. I. N. and Bernardine Hagan had learned of Wright's work through Edgar J. Kaufmann, a businessman who had hired Wright to design the Fallingwater house in Fayette County. The Hagans purchased of land near Uniontown, Pennsylvania, in July 1953 and asked Wright to design a Usonian home for them. Despite being busy with multiple other projects, Wright agreed to design a house ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conemaugh River
The Conemaugh River is a tributary of the Kiskiminetas River in Westmoreland County, Pennsylvania, Westmoreland, Indiana County, Pennsylvania, Indiana, and Cambria County, Pennsylvania, Cambria counties in the U.S. state of Pennsylvania. The name means 'Otter Creek', originating from the Unami-Lenape language word ''kwənəmuxkw'' 'otter'. Course The Conemaugh River is formed at Johnstown, Pennsylvania, Johnstown (site of the Johnstown Flood) in southwestern Cambria County, Pennsylvania, Cambria County by the confluence of the Little Conemaugh River, Little Conemaugh and Stonycreek River, Stonycreek rivers. It flows generally west–northwest, in a winding course through the mountains along the northern edge of Laurel Hill (Pennsylvania), Laurel Hill and Chestnut Ridge, Bedford County, Chestnut Ridge. Northwest of Blairsville, Pennsylvania, Blairsville it is joined by Blacklick Creek (Pennsylvania), Blacklick Creek. At Saltsburg, Pennsylvania, Saltsburg it is joined from t ... [...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 mineral, clay minerals (hydrous aluminium phyllosilicates, e.g., Kaolinite, kaolin, aluminium, Al2Silicon, Si2Oxygen, O5(hydroxide, 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 (Lamination (geology), laminae) less than one centimeter in thickness. This property is called ''Fissility (geology), 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 narrower 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 in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar, because they are the most resistant minerals to the weathering processes at the Earth's surface. Like uncemented sand, sandstone may be imparted any color by impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Because sandstone beds can form highly visible cliffs and other topography, topographic features, certain colors of sandstone have become strongly identified with certain regions, such as the red rock deserts of Arches National Park and other areas of the Southwestern United States, American Southwest. Rock formations composed of sandstone usually allow the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conglomerate (geology)
Conglomerate () is a sedimentary rock made up of rounded gravel-sized pieces of rock surrounded by finer-grained sediments (such as sand, silt, or clay). The larger fragments within conglomerate are called clasts, while the finer sediment surrounding the clasts is called the matrix. The clasts and matrix are typically cemented by calcium carbonate, iron oxide, silica, or hardened clay. Conglomerates form when rounded gravels deposited by water or glaciers become solidified and cemented by pressure over time. They can be found in sedimentary rock sequences of all ages but probably make up less than 1 percent by weight of all sedimentary rocks. They are closely related to sandstones in origin, and exhibit many of the same types of sedimentary structures, such as tabular and trough cross-bedding and graded bedding.Boggs, S. (2006) ''Principles of Sedimentology and Stratigraphy.'', 2nd ed. Prentice Hall, New York. 662 pp. Friedman, G.M. (2003) ''Classification of sediments and s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedimentary Rock
Sedimentary rocks are types of rock (geology), rock formed by the cementation (geology), cementation of sediments—i.e. particles made of minerals (geological detritus) or organic matter (biological detritus)—that have been accumulated or deposited at Earth's surface. Sedimentation is any process that causes these particles to settle in place. Geological detritus originates from weathering and erosion of existing rocks, or from the solidification of molten lava blobs erupted by volcanoes. The geological detritus is transported to the place of deposition by water, wind, ice or Mass wasting, mass movement, which are called agents of denudation. Biological detritus is formed by bodies and parts (mainly shells) of dead aquatic organisms, as well as their fecal mass, suspended in water and slowly piling up on the floor of water bodies (marine snow). Sedimentation may also occur when dissolved minerals precipitate from aqueous solution, water solution. The sedimentary rock cover of ... [...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] |
Mississippian (geology)
The Mississippian ( ), also known as Lower Carboniferous or Early Carboniferous, is a subperiod in the geologic timescale or a subsystem of the geologic record. It is the earlier of two subperiods of the Carboniferous period lasting from roughly 358.9 to 323.2 million years ago. As with most other geochronologic units, the rock beds that define the Mississippian are well identified, but the exact start and end dates are uncertain by a few million years. The Mississippian is so named because rocks with this age are exposed in the Mississippi Valley. The Mississippian was a period of marine transgression in the Northern Hemisphere: the sea level was so high that only the Fennoscandian Shield and the Laurentian Shield were dry land. The cratons were surrounded by extensive delta systems and lagoons, and carbonate sedimentation on the surrounding continental platforms, covered by shallow seas. In North America, where the interval consists primarily of marine limestones, i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laurel Hill Tunnel
Laurel Hill Tunnel is a tunnel on the Pennsylvania Turnpike that was bypassed and abandoned in 1964. It is bored through Laurel Ridge, spanning the border of Westmoreland and Somerset counties. Its western portal may be seen from the eastbound side of the Turnpike at milepost 99.3. The tunnel was built for the never-completed South Pennsylvania Railroad, as were two other tunnels to its east—Sideling Hill and Rays Hill—that were similarly on the original Turnpike and abandoned after being bypassed. Bypass The tunnels on the Turnpike had been bottlenecks ever since the Turnpike's opening in 1940 due to reduced speeds and two-way traffic in a single tube. A second tube was added to four tunnels— Allegheny Mountain, Tuscarora Mountain, Kittatinny Mountain, and Blue Mountain—where it was the less expensive option. Unlike the Sideling Hill and Rays Hill tunnels, the Laurel Hill Tunnel is not on the bypassed section commonly known as the Abandoned Pennsylvani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Turnpike
The Pennsylvania Turnpike, sometimes shortened to Penna Turnpike or PA Turnpike, is a controlled-access toll road which is operated by the Pennsylvania Turnpike Commission (PTC) in Pennsylvania. It runs for across the southern part of the state, connecting Pittsburgh, Harrisburg and Philadelphia, and passes through four tunnels as it crosses the Appalachian Mountains. A component of the Interstate Highway System, it is part of Interstate 76 (I-76) between the Ohio state line and Valley Forge ( I-70 runs concurrently with I-76 between New Stanton and Breezewood), Interstate 276 (I-276) between Valley Forge and Bristol Township, and I-95 from Bristol Township to the New Jersey state line. The turnpike's western terminus is at the Ohio state line in Lawrence County, where it continues west as the Ohio Turnpike. The eastern terminus is the New Jersey state line at the Delaware River–Turnpike Toll Bridge, which crosses the Delaware River in Bucks County. It c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ohiopyle, Pennsylvania
Ohiopyle is a borough in Fayette County, Pennsylvania, United States. The population was 38 at the 2020 census. While Ohiopyle has a tiny year-round population, it is often filled with tourists on the weekend, who come for the outdoor recreation opportunities at the surrounding Ohiopyle State Park, as well as the Great Allegheny Passage bicycle trail which connects with the Chesapeake and Ohio Canal towpath trail to form a continuous 335-mile off-road trail from Pittsburgh, Pennsylvania to Washington, D.C. The borough of Ohiopyle is served by the Uniontown Area School District. History Native Americans The first known group of people to inhabit the Ohiopyle area were the Monongahela, a clan of the Mound Builders. These Native Americans disappeared from the scene just as European colonists were beginning to arrive in North America. As the east coast was settled, the Native Americans who lived closer to the Atlantic Ocean were exterminated or forced to flee to the west. Various ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Confluence, Pennsylvania
Confluence is a borough in Somerset County, Pennsylvania, United States. It is part of the Johnstown, Pennsylvania, Metropolitan Statistical Area. It was settled in 1870 and incorporated in 1873. The population was 724 at the 2020 census. Geography Confluence is at (39.809997, -79.356692). The borough is located at the southern end of Lower Turkeyfoot Township, and the borough of Ursina sits to its east. Confluence is named for the confluence of the Casselman River and Laurel Hill Creek with the Youghiogheny River. It therefore provides many opportunities for boating and fishing (and hiking, as Pennsylvania's highest point, Mount Davis, is located nearby). According to the United States Census Bureau, the borough has a total area of , of which is land and (3.03%) is water. The borough is bordered to the south by the Youghiogheny River Lake and to the north by the Ohiopyle State Park. Climate The climate in this area has mild differences between highs and lows, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
