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Richardson adopted Campbell's unique field methodology and the two became lifelong friends. Richardson was assigned the Indiana quadrangle, which is about 235 square miles. In two and a half months, he discovered that the so-called (by the Second Pennsylvania Geological Survey) "Indiana anticline" is a syncline. [4]
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 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 ]
This region in Pennsylvania, made famous by NASA's LANDSAT images, is the second-largest in the state and home to the famous anthracite fields. The rocks here are severely folded and contain numerous anticlines and synclines that plunge and fold back over each other. There are numerous thrust faults that help create a chaotic mess.
Henderson was employed by the Pennsylvania Geological Survey in 1839 and 1840; his work on it was praised by geologist J. P. Lesley in a history of early survey efforts. [2] Henderson graduated from Jefferson Medical College in Philadelphia in 1841 and was commissioned as an Assistant Surgeon in the U.S. Navy. He was advanced to Surgeon in 1856 ...
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.
Some have vertical walls, others look like saucers or shallow basins, and some generate ponds by retaining water, according to the U.S. Geological Survey. The depressions are common in Florida ...
The unit name usage by the U.S. Geological Survey (USGS) includes Marcellus Shale and Marcellus Formation. [7] The term "Marcellus Shale" is the preferred name throughout most of the Appalachian region, although the term "Marcellus Formation" is also acceptable within the State of Pennsylvania. [7]