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Rocks that characterize this region include: limestone, dolomite, slate, shale, sandstone, siltstone, and some scattered basalt. Almost all of the rocks in the Great Valley in Pennsylvania are Ordovician in age and were deposited during a quiet period before the Taconic orogeny. The limestones and dolomites of this area are extensively quarried ...
Pennsylvania Minerals and Gems - specimens representing some of the finest minerals and gems from Pennsylvania. Systematic Collection - exhibiting minerals in systematic groupings by chemical classification according to Dana's System of Mineralogy. Masterpiece Gallery - an esthetic collection of notable mineral specimens from around the world.
^ Florida's state gem, moonstone, was adopted to highlight Florida's role in the United States' Lunar program, which landed the first astronauts on the Moon. [81] ^ Since 1983, Massachusetts has had 3 other official state rocks: State Historical Rock (Plymouth Rock), State Explorer Rock (Dighton Rock), and State Building and Monument Stone . In ...
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
Ralph Stover State Park is a Pennsylvania state park on 45 acres (18 ha) in Plumstead and Tinicum Townships, Bucks County, Pennsylvania in the United States. It is a very popular destination for whitewater kayaking on Tohickon Creek and rock climbing on High Rocks (Triassic sandstone of the Newark Group [3]).
The Wissahickon Formation is a mapped bedrock unit in Pennsylvania, New Jersey, and Delaware. It is named for the Wissahickon gorge in Fairmount Park, Philadelphia. In Maryland formations, the term "Wissahickon" is no longer used. Rocks in this classification have since been divided into several units, such as Lower Pelitic Schist and Prettyboy ...
The Silurian Shawangunk Formation is a mapped bedrock unit in eastern Pennsylvania, New Jersey, and New York. It is named for the Shawangunk Ridge for which it is the dominant rock type. The division of the Shawangunk between the Tuscarora Formation and Clinton Group has not been conclusively determined.
The Silurian Bloomsburg Formation is a mapped bedrock unit in Pennsylvania, New Jersey, New York and Maryland. It is named for the town of Bloomsburg, Pennsylvania , in which it was first described. The Bloomsburg marked the first occurrence of red sedimentary rocks in the Appalachian Basin .