ⓘ Gaps of the Allegheny
The gaps of the Allegheny, meaning gaps in the Allegheny Ridge in west-central Pennsylvania, is a series of escarpment eroding water gaps along the saddle between two higher barrier ridge-lines in the eastern face atop the Allegheny Ridge or Allegheny Front escarpment. The front extends south through Western Maryland and forms much of the border between Virginia and West Virginia, in part explaining the difference in cultures between those two post-Civil War states. While not totally impenetrable to daring and energetic travelers on foot, passing the front outside of the water gaps with even sure footed mules was nearly impossible without navigating terrain where climbing was necessary on slopes even burros would find extremely difficult.
The gaps, formed by small streams provide several suitable inclined plane, or ramp, connecting the Eastern river valley in the mountains on the plateau on the West and North, which otherwise was non-navigable on animal powered wagons until the middle of 1930-ies. As the map on the right shows, there are five ways the West from the East coast colonies over the Appalachian barrier ridge. Gaps in the Allegheny, all the current West of Hollidaysburg and Altoona, at Hurlbert grouped within Kittanning gorge of the same name adapted from the Lenape, but did immigrants made West of the mountains in the Empty lands in the 18th century. Streams cutting various shortcomings or release in the Susquehanna river tributaries of the Juniata river, or West branch of the Susquehanna, so was given a rich Pennsylvania Dutch country access to the interior and out to the meadows climb to the abyss, as did the main branch of the Susquehanna and its tributaries, climbing the ridges, with views of the Hudson and Mohawk valleys.
Hurlbert, in his study of the ways domestic Commerce, makes a distinction between the gaps leading up from the Susquehanna river through the watershed of the Allegheny river, between the Monongahela and the Allegheny, and those that can be reached across the divide between the Potomac river and Monongahela and cheat rivers - only group, the first batch to use the gaps Allegheny.
Crossing the line eleganckich mountains to the South, the eye notes first the break in the wall at the Delaware water gap, and the fact that the long arm of Susquehanna, in Juniata, reaching out through dark Kittanning gorge to its silver mate, the dancing Conemaugh. Here, amid the leafy aisles ran the brown and red Kittanning trail, the main route of the Pennsylvania traders from the rich area of York, Lancaster, and you will rest. On this General alignment the Broadway companies currently flies to Pittsburgh and Chicago.
Just South of another important way from the same region led, by way of Carlisle, Bedford and Ligonier, in Ohio. In the "highland trail" the Indian traders called it, for it rests on the dividing line between the Allegheny tributaries on the North of these Monongahela to the South.
Further South the picture shows the changes for the Atlantic plain widens considerably. The Potomac river, James Pedee, and the Savannah flow through valleys much longer than those of the Northern rivers. Here in the South, trade was conducted mostly shallop and Pinnace. Trails of the Indian skirted the rivers and offered for trader and Explorer passageway to the West, especially in the cities Cherokees in the southern Alleghanies or Unakas, but the waterways and the roads over which the hogsheads of tobacco were rolled back, and hence called "rolling roads" enough for the needs of the thin fringes of population settled along the rivers.
Trails from Winchester in Virginia and Frederick in Maryland focused on Cumberland at the head of the Potomac. Further to the West, in the hands of the Potomac block in close contact with Monongahela and Youghiogheny, and through this network of mountain and valley, in the "shadow of death" and Great meadows, coiled way Nemacolins in Ohio. Even today this ancient route is partially later the Baltimore and Ohio railroad and Western Maryland.
The gaps in the Allegheny and formal term of Geology, Allegheny front, from two different disciplines. First used by historians, often describing the local measures taken during the French and Indian war and native American territories to the United States Constitution, or discussing the transport network of East to West until the 1930s years of depression public works drove hundreds of roads through the mountains years after the wagon road barriers established corporate using something that actually went out of business with the emergence of the Railways. These low water gaps in the Allegheny arranged in an arc in the recess between the high barrier of the ridge-line, family or a succession of half-mountain passes releasing a similar series of watercourses, although growing more gradually from the West, where the depression of the hills were caused by the weight of a huge glacier, leveling the Appalachian plateau for a long time. In the days before the scientific community started to go to fancy conferences in holiday cities and formed committees on the standardization of terms, geographical names were usually applied locally, copied universal regional maps, and epoch of the last escarpment of the rise of the plateau Allegheny, generally known as the Allegheny mountains or Allegheny ridge or just Allegheny. The modern term of art, the Allegheny front, was invented physical geologists and other Earth scientists interested in geomorphology reasoning processes that make one landscape different from another in time, cause and space.