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2. Pennsylvania Geological Survey - Wikipedia

   en.wikipedia.org/wiki/Pennsylvania_Geological_Survey

   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 ...

3. List of mapped rock formations in Pennsylvania - Wikipedia

   en.wikipedia.org/wiki/List_of_mapped_rock...

   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 ]

4. Allegheny Group - Wikipedia

   en.wikipedia.org/wiki/Allegheny_group

   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.

5. Geology of Pennsylvania - Wikipedia

   en.wikipedia.org/wiki/Geology_of_Pennsylvania

   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 ...

6. Bibliography and Index of Geology - Wikipedia

   en.wikipedia.org/wiki/Bibliography_and_Index_of...

   In 1896, the United States Geological Survey released N.H. Darton's 1045-page Catalogue and index of contributions to North American geology, 1732-1891 and also commenced an incremental publication of Fred Boughton Weeks' serial work Bibliography and index of North American geology, paleontology, petrology, and mineralogy for 1892 and 1893.

7. File:Monographs of the United States Geological Survey (IA ...

   en.wikipedia.org/wiki/File:Monographs_of_the...

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

8. Category:Geological surveys in the United States - Wikipedia

   en.wikipedia.org/wiki/Category:Geological...

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

9. Pottsville Formation - Wikipedia

   en.wikipedia.org/wiki/Pottsville_Formation

   The Pennsylvanian Pottsville Formation is a mapped bedrock unit in Pennsylvania, western Maryland, West Virginia, Ohio, and Alabama.It is a major ridge-former in the Ridge-and-Valley Appalachians of the eastern United States. [3]