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Pennsylvanian period

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Pennsylvanian period

US term for the Upper or Late Carboniferous period of geological time, 323–290 million years ago; it is named after the US state, which contains vast coral deposits.
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Abstract: Two cores from Buchanan and Andrew Counties in the Forest City Basin, northwestern Missouri, yielded approximately 1,200 feet of sedimentary rock deposited during the Pennsylvanian Period (approximately 300 million years ago), a period characterized by rapid fluctuations in sea level.
Sedimentology, Palynology, and Sea Level Fluctuations Recorded From ... by Oboh-Ikuenobe, Francisca E. / Transactions of the Missouri Academy of Science
Around 315 million years ago, during the Pennsylvanian period of Earth's history, these regions formed the tropical belt of a huge supercontinent that straddled the equator.
Swamped by climate change? Ancient wetlands defy modern rules of ... by Monastersky, Richard / Science News
This is just the opposite of what scientists had thought was the last major movement during the Pennsylvanian period some 300 million years ago, in which the Wichita Mountains to the south were uplifted, causing land north of the fault to sink.
A fault of youth; new scientific ground was broken when geologists ... by Weisburd, Stefi / Science News
 
 
 
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