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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.
The following is a list of the mapped bedrock units in Pennsylvania. The rocks are listed in stratigraphic order. The rocks are listed in stratigraphic order. [ 1 ]
Since Pennsylvania first introduced numbered traffic routes in 1924, a keystone symbol shape has been used, in reference to Pennsylvania being the "Keystone State". The signs originally said "Penna" (a common abbreviation for Pennsylvania at the time), followed by the route number in block-style numbering in a keystone cutout.
The Pennsylvania Geological Survey, or Bureau of Topographic and Geologic Survey (BTGS), is a geological survey enacted by the Pennsylvania General Assembly "to serve the citizens of Pennsylvania by collecting, preserving, and disseminating impartial information on the Commonwealth's geology, geologic resources, and topography in order to contribute to the understanding, wise use, and ...
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Pages in category "Geologic formations of Pennsylvania" The following 44 pages are in this category, out of 44 total. This list may not reflect recent changes. A.
Pennsylvania is 180 miles (290 km) north to south and 310 miles (500 km) east to west. The total land area is 44,817 square miles (116,080 km 2)—739,200 acres (2,991 km 2) of which are bodies of water. It is the 33rd largest state in the United States. The state's highest point is 3,213 feet (979 m) above sea level at Mount Davis. Its lowest ...
United States The Ordovician Martinsburg Formation (Om) is a mapped bedrock unit in Pennsylvania , New Jersey , Maryland , Virginia , and West Virginia . It is named for the town of Martinsburg, West Virginia for which it was first described.