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Rays Hill
Rays Hill is a mountain ridge in Pennsylvania's Ridge and Valley Appalachians region. It is bordered to the east by Sideling Hill. About halfway along its run, the west side of Rays Hill ties into Broad Top Mountain, a large plateau. On its west it is bordered by Tussey Mountain south of Broad Top Mountain and Rocky Ridge north of Broad Top Mountain. The ridge is known both as "Rays" and "Wrays". To the north of Broad Top Mountain it is most often spelled "Wrays" and to the south most often "Rays." The southern section holds the Rays Hill Tunnel, one of the abandoned tunnels of the Pennsylvania Turnpike. The northern section holds Wrays Hill Tunnel, one of two on the East Broad Top Railroad. This mountain ridge forms the boundary between Bedford and Fulton counties in south central Pennsylvania, and also extends northward into Huntingdon County. Part of Buchanan State Forest lies on Rays Hill. Geology Rays Hill is held up by the Mississippian Pocono Formation, which dips ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bedford County, Pennsylvania
Bedford County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 47,577. The county seat is Bedford. History In 1750 Robert MacRay, a Scots-Irish immigrant, opened the first trading post in Raystown (which is now Bedford) on the land that is now Bedford County. The early Anglo-American settlers had a difficult time dealing with raids from Native Americans. In 1754 fierce fighting erupted as Native Americans became allied with the British or French in the North American front, known as the French and Indian War, of the Seven Years' War between those nations in Europe. In 1759, after the capture of Fort Duquesne in Allegheny County, Pennsylvania, Allegheny County, on the Allegheny and Monongahela rivers, English colonists built a road between the fort (which was renamed as Fort Pitt (Pennsylvania), Fort Pitt) to the newly built Fort Bedford in Raystown. The English defeated the French in the war and took over their territories in North Am ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buchanan State Forest
Buchanan State Forest is a Pennsylvania State Forest in Pennsylvania Bureau of Forestry District #2. The main office is located in McConnellsburg in Fulton County, Pennsylvania, in the United States. The forest also includes tracts in Franklin and Bedford Counties. It is named for James Buchanan of Pennsylvania, the fifteenth President of the United States. The forest is found in the Ridge-and-Valley Appalachians of south-central Pennsylvania and comprises divided into several units located in Bedford, Fulton, and Franklin Counties. History Buchanan State Forest was formed as a direct result of the depletion of the forests of Pennsylvania that took place during the mid-to-late 19th century. Conservationists like Dr. Joseph Rothrock became concerned that the forests would not regrow if they were not managed properly. Lumber and Iron companies had harvested the old-growth forests for various reasons. The clear cut the forests and left behind nothing but dried tree tops and ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms Of Fulton County, Pennsylvania
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure and soil type. Gross physical features or landforms include intuitive elements such as berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodies and sub-surface features. Mountains, hills, plateaux, and plains are the fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ridges Of Pennsylvania
A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The lines along the crest formed by the highest points, with the terrain dropping down on either side, are called the ridgelines. Ridges are usually termed hills or mountains as well, depending on size. Smaller ridges, especially those leaving a larger ridge, are often referred to as spurs. Types There are several main types of ridges: ;Dendritic ridge: In typical dissected plateau terrain, the stream drainage valleys will leave intervening ridges. These are by far the most common ridges. These ridges usually represent slightly more erosion resistant rock, but not always – they often remain because there were more joints where the valleys formed or other chance occurrences. This type of ridge is generally somewhat random in orientation, often ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syncline
In structural geology, a syncline is a fold with younger layers closer to the center of the structure, whereas an anticline is the inverse of a syncline. A synclinorium (plural synclinoriums or synclinoria) is a large syncline with superimposed smaller folds. Synclines are typically a downward fold (synform), termed a synformal syncline (i.e. a trough), but synclines that point upwards can be found when strata have been overturned and folded (an antiformal syncline). Characteristics On a geologic map, synclines are recognized as a sequence of rock layers, with the youngest at the fold's center or ''hinge'' and with a reverse sequence of the same rock layers on the opposite side of the hinge. If the fold pattern is circular or elongate, the structure is a basin. Folds typically form during crustal deformation as the result of compression that accompanies orogenic mountain building. Notable examples * Powder River Basin, Wyoming, US * Sideling Hill roadcut along Interstate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Town Hill
Town Hill is a mountain range located in Allegany County, Maryland and Bedford and Fulton Counties in Pennsylvania. Its southern end is 2.25 miles northwest of Kiefer in Allegany County. It trends northeasterly, and ends about 1.5 miles south of the town of Emmaville in Fulton County. Its highest elevation is 2000 feet. Interstate 70 crosses Town Hill at a narrow angle to the mountain, following the ridge for four to five miles as it slowly climbs one side and descends the other. In Maryland, Interstate 68 skirts the southern edge of the mountain while the original alignment of U.S. Route 40, now signed as U.S. Route 40 Scenic, crosses over it. Part of Buchanan State Forest lies on Town Hill in Fulton County. South of the Potomac River in Hampshire County, West Virginia, Town Hill rises to a height of . Geology Town Hill is held up by the Mississippian age Pocono Formation, which dips to the northwest. The Mississippian-Devonian Rockwell Formation and Devonian Catskil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catskill Formation
The Devonian Catskill Formation or the Catskill Clastic wedge is a unit of mostly terrestrial sedimentary rock found in Pennsylvania and New York. Minor marine layers exist in this thick rock unit (up to ). It is equivalent to the Hampshire Formation of Maryland, West Virginia, and Virginia. The Catskill is the largest bedrock unit of the Upper Devonian in northeast Pennsylvania and the Catskill region of New York, from which its name is derived. The Pocono Mountains of Pennsylvania are largely underlain by this unit as well. The rocks of the Catskill are predominantly red sandstone indicating a large scale terrestrial deposition during the Acadian orogeny. Many beds are cyclical in nature, preserving the record of a dynamic environment during its approximately 20 million years of deposition. Depositional environment During the Devonian period, the Catskill Delta was formed by a series of river deltas and otherwise marshy terrain. This terrain was sandwiched between the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Devonian
The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, where rocks from this period were first studied. The first significant adaptive radiation of life on dry land occurred during the Devonian. Free-sporing vascular plants began to spread across dry land, forming extensive forests which covered the continents. By the middle of the Devonian, several groups of plants had evolved leaves and true roots, and by the end of the period the first seed-bearing plants appeared. The arthropod groups of myriapods, arachnids and hexapods also became well-established early in this period, after starting their expansion to land at least from the Ordovician period. Fish reached substantial diversity during this time, leading the Devonian to often be dubbed the Age of Fishes. The placoderms began dominating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rockwell Formation
The Rockwell Formation is a late Devonian and early Mississippian mapped bedrock unit in West Virginia, Maryland, and Pennsylvania, in the United States. Description The Rockwell Formation was described at its type section at Rockwell Run in West Virginia as soft arkosic sandstone, fine hard conglomerate, and buff hackly shale. The formation was originally described in West Virginia by Stose and Swartz (1912). It was first described in Maryland by H. E. Vokes (1957),Vokes, H.E., 1957, Geography and geology of Maryland: Maryland Geological Survey Bulletin, no. 19, p. 243. and later described in central Pennsylvania by C. R. Wood (1980).Wood, C.R., 1980, Summary groundwater resources of Centre County, Pennsylvania: Pennsylvania Geological Survey Water Resource Report, 4th series, no. 48, p. 60. Stratigraphy The Rockwell is generally considered a Formation. At Formation rank, it has several members, including the Patton and Riddlesburg Shale Members,Kammer, T.W., and Bjerstedt, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strike And Dip
Strike and dip is a measurement convention used to describe the orientation, or attitude, of a planar geologic feature. A feature's strike is the azimuth of an imagined horizontal line across the plane, and its dip is the angle of inclination measured downward from horizontal. They are used together to measure and document a structure's characteristics for study or for use on a geologic map. A feature's orientation can also be represented by dip and dip direction, using the azimuth of the dip rather than the strike value. Linear features are similarly measured with trend and plunge, where "trend" is analogous to dip direction and "plunge" is the dip angle. Strike and dip are measured using a compass and a clinometer. A compass is used to measure the feature's strike by holding the compass horizontally against the feature. A clinometer measures the features dip by recording the inclination perpendicular to the strike. These can be done separately, or together using a tool such a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pocono Formation
The Mississippian Pocono Formation is a mapped bedrock unit in Pennsylvania, Maryland, and West Virginia, in the United States. It is also known as the Pocono Group in Maryland and West Virginia, and the upper part of the Pocono Formation is sometimes called the Burgoon Formation or Burgoon Sandstone in Pennsylvania. The Pocono is a major ridge-former In the Ridge-and-Valley Appalachians of the eastern United States The Pocono is also a lateral equivalent of the Purslane Sandstone in Maryland and West Virginia. D. Brezinski of Maryland Geological Survey recommended abandoning use of the term Pocono in Maryland in favor of "Purslane" in 1989. Description The Pocono is a dominantly gray color with quartzitic medium to coarse-grained sandstones. The base of the Pocono Formation is marked by conglomerate. Notable exposures * The type section of the Burgoon Sandstone is in the valley of Burgoon Run, above Kittanning Point, Blair County, Pennsylvania. * A spectacular exposure of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mississippian Age
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, it is treate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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