pennsylvanian standard
1Standard gauge — For Standard Gauge in toy trains, see Standard Gauge (Toy Trains). Track gauge by size …
2Central Pennsylvania accent — Central Pennsylvania speech is closely related to Western Pennsylvania speech, which is generally referred to as Pittsburgh English, although the speech extends beyond just the city of Pittsburgh. It bears little resemblance to the Southeastern… …
3amphibian — /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,… …
4Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… …
5University of Pennsylvania — This article is about the private Philadelphia based Ivy League university, colloquially referred to as Penn . For the public university located in State College, Pennsylvania, and colloquially known as Penn State , see Pennsylvania State… …
6Polystrate 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 [… …
7Amtrak — For other uses, see Amtrak (disambiguation). Amtrak Map of the Amtrak system (2007) Reporting mark …
8Music history of the United States during the colonial era — History of the United States Military Postal Diplomatic Expansionist Religious Industrial Feminist Music …
9United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
10Cambrian — For other uses, see Cambrian (disambiguation). Cambrian Period 542–488.3 million years ago …
