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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 ...
The top plate illustrates the tectonic setting for the sediments of Pennsylvania. This section is characterized by the metamorphic rocks that provide much of the bedrock for this area. The oldest exposed rocks in Pennsylvania are found here and consist of the Baltimore Gneiss. [8] These rocks have a complex history and a vast array of different ...
The Allegheny Group, often termed the Allegheny Formation, [2] is a Pennsylvanian-age geological unit in the Appalachian Plateau.It is a major coal-bearing unit in the eastern United States, extending through western and central Pennsylvania, western Maryland and West Virginia, and southeastern Ohio.
Pulpit Rocks is a geological formation adjacent to Pike Road, or Alexandria Pike Road, Old U.S. Route 22, northwest of Huntingdon in Huntingdon County, Pennsylvania.These weathered rock formations were instrumental in the determination of the stratigraphy of the Appalachian Mountains in the mid-19th century by the Pennsylvania Geological Survey.
The following is a list of the mapped bedrock units in Pennsylvania. The rocks are listed in stratigraphic order. [1] System Group name Formation name Member name
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.)
The Devonian Old Port Formation is a mapped bedrock unit in Pennsylvania, USA.Details of the type section and of stratigraphic nomenclature for this unit as used by the U.S. Geological Survey are available on-line at the National Geologic Map Database. [2]
Loysburg Gap is a water gap where Pennsylvania Route 36 and the Yellow Creek pass through Tussey Mountain near Loysburg in Bedford County, Pennsylvania, United States. Yellow Creek flows eastward through the gap towards its junction with the Raystown Branch of the Juniata River .
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