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Erie Plain
The Erie Plain is a lacustrine plain that borders Lake Erie in North America. From Buffalo, New York, to Cleveland, Ohio, it is quite narrow (at best only a few miles/kilometers wide), but broadens considerably from Cleveland around Lake Erie to Southern Ontario, where it forms most of the Ontario peninsula. The Erie Plain was used in the United States as a natural gateway to the North American interior, and in both the United States and Canada the plain is heavily populated and provides very fertile agricultural land. Creation of the plain The Erie Plain is a lacustrine plain consisting largely of sediment laid down by a series of proglacial lakes. These existed in the late Pleistocene Epoch, about 25,000 years ago to about 11,700 years ago, and were created by glaciers of the Wisconsin glaciation (the last ice age). The largest of these was Lake Whittlesey. In some places in Pennsylvania and Ohio, the Erie Plain is broken by the very slight former shoreline of Lake Warren. This g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erie Plain
The Erie Plain is a lacustrine plain that borders Lake Erie in North America. From Buffalo, New York, to Cleveland, Ohio, it is quite narrow (at best only a few miles/kilometers wide), but broadens considerably from Cleveland around Lake Erie to Southern Ontario, where it forms most of the Ontario peninsula. The Erie Plain was used in the United States as a natural gateway to the North American interior, and in both the United States and Canada the plain is heavily populated and provides very fertile agricultural land. Creation of the plain The Erie Plain is a lacustrine plain consisting largely of sediment laid down by a series of proglacial lakes. These existed in the late Pleistocene Epoch, about 25,000 years ago to about 11,700 years ago, and were created by glaciers of the Wisconsin glaciation (the last ice age). The largest of these was Lake Whittlesey. In some places in Pennsylvania and Ohio, the Erie Plain is broken by the very slight former shoreline of Lake Warren. This g ... [...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 beddin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portage Escarpment
The Portage Escarpment is a major landform in the U.S. states of Ohio, Pennsylvania, and New York which marks the boundary between the Till Plains to the north and west and the Appalachian Plateau to the east and south. The escarpment is the defining geological feature of New York's Finger Lakes region. Its proximity to Lake Erie creates a narrow but easily traveled route between upstate New York and the Midwest. Extensive industrial and residential development occurred along this route. It is also called the Allegheny Escarpment in its southern portion after it diverges from Lake Erie in Ohio. General description The Portage Escarpment forms the northern and western boundary between the Appalachian Plateau and the Till Plains of the Central Lowland physiographic section of the United States. The escarpment begins in eastern New York. Nevin Fenneman placed its starting point between Cayuga Lake and Seneca Lake, where the Onondaga Escarpment transitions to the sandstone of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Appalachian Plateau
The Appalachian Plateau is a series of rugged dissected plateaus located on the western side of the Appalachian Mountains. The Appalachian Mountains are a mountain range that run down the Eastern United States. The Appalachian Plateau is the northwestern part of the Appalachian Mountains, stretching from New York to Alabama. The plateau is a second level United States physiographic region, covering parts of the states of New York, Pennsylvania, Ohio, Maryland, West Virginia, Virginia, Kentucky, Tennessee, Alabama, and Georgia. Geography and physical features The formation of the plateau began during the Paleozoic Era. Regional uplift during this time caused the area to rise altogether without changing the topography of the land. The eastern side of the plateau appears as a mountain range. This false appearance is due to a very steep slope on the eastern side known as the Allegheny Front. The eastern edge is the highest part of the Appalachian Plateau. In Pennsylvania, the ele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Escarpment
An escarpment is a steep slope or long cliff that forms as a result of faulting or erosion and separates two relatively level areas having different elevations. The terms ''scarp'' and ''scarp face'' are often used interchangeably with ''escarpment''. Some sources differentiate the two terms, with ''escarpment'' referring to the margin between two landforms, and ''scarp'' referring to a cliff or a steep slope. In this usage an escarpment is a ridge which has a gentle slope on one side and a steep scarp on the other side. More loosely, the term ''scarp'' also describes a zone between a coastal lowland and a continental plateau which shows a marked, abrupt change in elevation caused by coastal erosion at the base of the plateau. Formation and description Scarps are generally formed by one of two processes: either by differential erosion of sedimentary rocks, or by movement of the Earth's crust at a geologic fault. The first process is the more common type: the escarpment is a t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huron Plain
Huron may refer to: People * Wyandot people (or Wendat), indigenous to North America * Wyandot language, spoken by them * Huron-Wendat Nation, a Huron-Wendat First Nation with a community in Wendake, Quebec * Nottawaseppi Huron Band of Potawatomi, a band of Potawatomi American Indians, based in Calhoun County, Michigan), are also known as the Huron Potawatomi Bodies of water * Lake Huron, one of the North American Great Lakes * Huron Swamp in Springfield Township, Oakland County, Michigan * Huron Falls, one of 24 named waterfalls in Ricketts Glen State Park in Pennsylvania * Huron Lake, in the parish municipality of Lac-aux-Sables, Mékinac Regional County Municipality, Quebec * Huron River (other) * Rivière des Hurons (other) Places Canada * Lac-Huron, Quebec, an unorganized territory in the Rimouski-Neigette Regional County Municipality * Huron-Kinloss, a township in Bruce County, Ontario * Huron East, Ontario, a municipality in Huron County, Ontario * Rural ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ontario Plain
Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central Canada, it is Canada's most populous province, with 38.3 percent of the country's population, and is the second-largest province by total area (after Quebec). Ontario is Canada's fourth-largest jurisdiction in total area when the territories of the Northwest Territories and Nunavut are included. It is home to the nation's capital city, Ottawa, and the nation's most populous city, Toronto, which is Ontario's provincial capital. Ontario is bordered by the province of Manitoba to the west, Hudson Bay and James Bay to the north, and Quebec to the east and northeast, and to the south by the U.S. states of (from west to east) Minnesota, Michigan, Ohio, Pennsylvania, and New York. Almost all of Ontario's border with the United States follows ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
