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The Pennsylvanian (/ ˌpɛnsəlˈveɪni.ən / pen-səl-VAYN-i-ən, [4] also known as Upper Carboniferous or Late Carboniferous) is, on the ICS geologic timescale, the younger of two subperiods of the Carboniferous Period (or the upper of two subsystems of the Carboniferous System). It lasted from roughly 323.2 million years ago to 298.9 million ...
The Geology of Pennsylvania consists of six distinct physiographic provinces, three of which are subdivided into different sections. Each province has its own economic advantages and geologic hazards and plays an important role in shaping everyday life in the state.
The Pennsylvanian ( / ˌpɛnsəlˈveɪni.ən / pen-səl-VAYN-i-ən, also known as Upper Carboniferous or Late Carboniferous) is, on the ICS geologic timescale, the younger of two subperiods of the Carboniferous Period (or the upper of two subsystems of the Carboniferous System).
Pennsylvanian epoch of geologic time, between 323.2 and 298.9 million years ago during the Carboniferous Period. Also known as the Upper Carboniferous−Late Carboniferous epoch.
The Pennsylvanian subperiod is named for the state of Pennsylvania. In 1891 Henry Shaler Williams coined the name for the younger strata of the Carboniferous Period that are well exposed in Pennsylvania. These rocks serve as a counterpart to the previous geologic period—the Mississippian.
Geology Geologic Setting. The rocks in the mid-continent region are packed with abundant fossils of marine animals of Pennsylvanian age. This outcrop belt stretches through eastern Kansas and Oklahoma, much of Iowa, Missouri and Illinois, and south into Texas.
The Pennsylvanian (/ ˌ p ɛ n s əl ˈ v eɪ n i. ən / pen-səl-VAYN-i-ən, [4] also known as Upper Carboniferous or Late Carboniferous) is, on the ICS geologic timescale, the younger of two subperiods of the Carboniferous Period (or the upper of two subsystems of the Carboniferous System).
The Pennsylvanian is the Upper Carboniferous epoch in the strata of North America. It comes after (above) the Mississippian, and before the Permian. The Pennsylvanian started about 323 million years ago (mya), and ended about 299 mya.
The term Pennsylvanian is a U.S. coinage that is based on the frequency of rocks of this period in the state of Pennsylvania. Internationally, the terms late Carboniferous Period or Silesian Period are preferred.
The Pennsylvanian is, in the ICS geologic timescale, the younger of two subperiods (or upper of two subsystems) of the Carboniferous Period. It lasted from roughly 323.2 ± 1.3 to 298.9 ± 0.8 Ma (million years ago).