The Early Pennsylvanian (also known as the Lower Pennsylvanian) is the first of three subepochs of the
References
* [http://www.stratigraphy.org/geowhen/stages/Early_Pennsylvanian.html GeoWhen Database - Early Pennsylvanian]
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Pennsylvanian — This article is about the geologic subperiod. For passenger train, see Pennsylvanian (Amtrak). System Subsystem/ Series Stage Age (Ma) Permian Cisuralian Asselian younger … Wikipedia
Pennsylvanian (Amtrak) — Infobox Amtrak name=Pennsylvanian image size=300 image caption=The Amtrak 42 Pennsylvanian arriving in Greensburg. map filename= map size= numbers=42, 43, 44 route=New York, NY Newark, NJ Philadelphia, PA Harrisburg, PA Pittsburgh, PA distance=mi … Wikipedia
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Polystrate fossil — [ Nova Scotia, Canada (printed 1868).] Polystrate or upright fossil describes fossils of single organisms (such as tree trunks) that run through more than one geological strata. Entire fossil forests have been discovered [… … Wikipedia
amphibian — /am fib ee euhn/, n. 1. any cold blooded vertebrate of the class Amphibia, comprising frogs and toads, newts and salamanders, and caecilians, the larvae being typically aquatic, breathing by gills, and the adults being typically semiterrestrial,… … Universalium
reptile — reptilelike, adj. reptiloid /rep tl oyd /, adj. /rep til, tuyl/, n. 1. any cold blooded vertebrate of the class Reptilia, comprising the turtles, snakes, lizards, crocodilians, amphisbaenians, tuatara, and various extinct members including the… … Universalium
Mississippian — For other uses, see Mississippian (disambiguation). Not to be confused with the Mississippian period describing the dominance of the Mississippian culture. System Subsystem/ Series Stage Age (Ma) Permian Cisuralian Asselian … Wikipedia
