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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 ...
Shaded relief map of the Llano Estacado. Texas contains a wide variety of geologic settings. The state's stratigraphy has been largely influenced by marine transgressive-regressive cycles during the Phanerozoic, with a lesser but still significant contribution from late Cenozoic tectonic activity, as well as the remnants of a Paleozoic mountain range.
The Woodbine Group is a geological formation in east Texas whose strata date back to the Early to Middle Cenomanian age of the Late Cretaceous. [1] It is the producing formation of the giant East Texas Oil Field (also known as the "Black Giant") from which over 5.42 billion barrels of oil have been produced. [ 3 ]
Wissahickon Creek is a tributary of the Schuylkill River in Montgomery and Philadelphia Counties, Pennsylvania. [1]Wissahickon Creek rises in Montgomery County, runs approximately 23 miles (37 km) passing through and dividing Northwest Philadelphia before emptying into the Schuylkill River at Philadelphia.
Wissahickon, Philadelphia, a section or neighborhood of Philadelphia; Wissahickon Creek, a tributary of the Schuylkill River Wissahickon Memorial Bridge, spans the above creek in Philadelphia; Wissahickon Trail, a suburban trail; Wissahickon Formation, a mapped bedrock unit in Pennsylvania, New Jersey, and Delaware
Group or Formation Period Notes Admiral Formation: Permian: Aguja Formation: Cretaceous: Alacran Mountain Formation: Permian: Albany Group/Lueders Formation: Permian: Albany Group/Waggoner Ranch Formation
Llewellyn Formation: φl Pennsylvanian Pottsville Formation: φp Mississippian: Mauch Chunk Formation: Mmc Mississippian Pocono Formation (Burgoon Formation) Mp (Mb) Mississippian/Devonian Spechty Kopf Formation: Mississippian/Devonian Rockwell Formation: Mississippian/Devonian Huntley Mountain Formation: Devonian: Catskill Formation: Dck ...
The Wilcox Group is an important geologic group in the Gulf of Mexico Basin and surrounding onshore areas from Mexico and Texas to Louisiana and Alabama. The group ranges in age from Paleocene to Eocene and is in Texas subdivided into the Calvert Bluff , Simsboro and Hooper Formations , [ 1 ] and in Alabama into the Nanafalia and Hatchetigbee ...