Pennsylvanian Period

Pennsylvanian Period
In North America, the interval of geologic time roughly equivalent to what is internationally designated the Late Carboniferous Period (323–290 million years ago).

Because the rocks that originated during this span of time are widespread in the state of Pennsylvania, some U.S. geologists favour the term over Late Carboniferous Period, which was first adopted in Europe.

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Universalium. 2010.

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  • Pennsylvanian period — noun from 310 million to 280 million years ago; warm climate; swampy land • Syn: ↑Pennsylvanian, ↑Upper Carboniferous, ↑Upper Carboniferous period • Instance Hypernyms: ↑period, ↑geological period • Pa …   Useful english dictionary

  • Pennsylvanian — /pen seuhl vayn yeuhn, vay nee euhn/, adj. 1. of or pertaining to the state of Pennsylvania. 2. Geol. noting or pertaining to a period of the Paleozoic Era, occurring from about 310 to 280 million years ago and characterized by warm climates,… …   Universalium

  • Pennsylvanian — Penn•syl•va•nian [[t]ˌpɛn səlˈveɪn yən, ˈveɪ ni ən[/t]] adj. 1) of or pertaining to the state of Pennsylvania 2) gel of or pertaining to a period of the Paleozoic Era, occurring from about 310 to 280 million years ago and characterized by warm… …   From formal English to slang

  • period — /pear ee euhd/, n. 1. a rather large interval of time that is meaningful in the life of a person, in history, etc., because of its particular characteristics: a period of illness; a period of great profitability for a company; a period of social… …   Universalium

  • Pennsylvanian — ☆ Pennsylvanian [pen΄səl vān′yən, pen΄səlvā′nē ən ] adj. 1. of Pennsylvania 2. [sometimes p ] designating or of the second and last geologic subdivision of the Carboniferous Period, characterized by the development of vast deposits of dead, coal… …   English World dictionary

  • 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

  • Pennsylvanian Subperiod — ▪ geochronology       second major interval of the Carboniferous Period, lasting from 318.1 to 299 million years ago. The Pennsylvanian is recognized as a time of significant advance and retreat by shallow seas. Many nonmarine areas near the… …   Universalium

  • Pennsylvanian — adjective Date: 1698 1. of or relating to Pennsylvania or its people 2. of, relating to, or being the period of the Paleozoic era in North America between the Mississippian and Permian or the corresponding system of rocks see geologic time table… …   New Collegiate Dictionary

  • Pennsylvanian — 1. noun a) An inhabitant or a resident of the state of Pennsylvania. b) Any of the three Pennsylvanian epochs. 2. adjective a) of any of the three …   Wiktionary

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