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The Geology of Pennsylvania consists of six distinct physiographic provinces, three of which are subdivided into different sections. Each province has its own economic advantages and geologic hazards and plays an important role in shaping everyday life in the state.
USGS Hydrologic Unit Map - State of Pennsylvania (1974) Shaw, Lewis C. (June 1984). Pennsylvania Gazetteer of Streams Part II (Water Resources Bulletin No. 16). Prepared in Cooperation with the United States Department of the Interior Geological Survey (1st ed.).
The following is a list of the mapped bedrock units in Pennsylvania. The rocks are listed in stratigraphic order. ... Formation name Member name Map symbol [2 ...
The Susquehanna River forms from two main branches: the North Branch, which rises in Cooperstown, New York, and is regarded by federal mapmakers as the main branch or headwaters, [11] and the West Branch, which rises in western Pennsylvania and joins the main branch near Northumberland in central Pennsylvania. The river drains 27,500 square ...
The Pennsylvania Dutch region in south-central Pennsylvania is a favorite for sightseers. The Pennsylvania Dutch, including the Amish, Mennonites, and at least 15 other sects are common in the rural areas around the cities of Lancaster, York, and Harrisburg with smaller populations extending northeast to the Lehigh Valley and up to the Susquehanna Valley.
Location of Kittanning Gap after GNIS finding of 'Kittanning Gap, Pennsylvania' seen in USGS National Map viewer screenshot. The gap is located effectively in a western suburb of Altoona. • The maps on this page also are showing the nearby PRR Horseshoe Curve which crosses watercourses cutting three other gaps.
The river flows to the east through the mountains within the county through several water gaps caused by a group of faults trending east–west through the central part of the county. The river then turns north and flows into Raystown Lake in Huntingdon County. The southern third of the county is drained by several tributaries of the Potomac River.
Bureau of Topographic and Geologic Survey, Pennsylvania Department of Conservation and Natural Resources, Harrisburg, Pennsylvania. (Note: having been published in 1959, this reference uses the now obsolete and abandoned classic, Nebraskan, Kansan, and so forth, Midwest glacial terminology.)
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