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The Carboniferous is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period 358.9 Ma to the beginning of the Permian Period, 298.9 Ma. In North America, the Carboniferous is often treated as two separate geological periods, the earlier Mississippian and the later Pennsylvanian.
The Mississippian is a subperiod in the geologic timescale or a subsystem of the geologic record. It is the earlier of two subperiods of the Carboniferous period lasting from roughly 358.9 to 323.2 million years ago. As with most other geochronologic units, the rock beds that define the Mississippian are well identified, but the exact start and end dates are uncertain by a few million years. The Mississippian is so named because rocks with this age are exposed in the Mississippi Valley.
The Pennsylvanian is, on the ICS geologic timescale, the younger of two subperiods of the Carboniferous Period. It lasted from roughly 323.2 million years ago to 298.9 million years ago. As with most other geochronologic units, the rock beds that define the Pennsylvanian are well identified, but the exact date of the start and end are uncertain by a few hundred thousand years. The Pennsylvanian is named after the U.S. state of Pennsylvania, where the coal beds of this age are widespread.
The Pennsylvanian is a 444-mile (715 km) daily daytime Amtrak train running between New York City and Pittsburgh via Philadelphia. The trains travel across the Appalachian Mountains, through Pennsylvania's capital Harrisburg, the Pennsylvania Dutch Country, suburban and central Philadelphia, and New Jersey en route to New York. The entire train ride takes about 9 hours total: 1.5 hours between New York and Philadelphia, 2 hours between Philadelphia and Harrisburg, and 5.5 hours between Harrisburg and Pittsburgh.
In the geologic timescale, the Asselian is the earliest geochronologic age or lowermost chronostratigraphic stage of the Permian. It is a subdivision of the Cisuralian Epoch or Series. The Asselian lasted between 298.9 and 293.52 million years ago (Ma). It was preceded by the Gzhelian and followed by the Sakmarian.
Ianthasaurus is an extinct genus of small edaphosaurids from the Late Carboniferous.
The Black Warrior Basin is a geologic sedimentary basin of western Alabama and northern Mississippi in the United States. It is named for the Black Warrior River and is developed for coal and coalbed methane production, as well as for conventional oil and natural gas production. Coalbed methane of the Black Warrior Basin has been developed and in production longer than in any other location in the United States. The coalbed methane is produced from the Pennsylvanian Pottsville Coal Interval.
SS Pennsylvanian was a cargo ship built in 1913 for the American-Hawaiian Steamship Company. During World War I she was requisitioned by the United States Navy and commissioned as USS Pennsylvanian (ID-3511) in September 1918, and renamed two months later to USS Scranton. After her naval service, her original name of Pennsylvanian was restored.
The Medullosales is an extinct order of pteridospermous seed plants characterised by large ovules with circular cross-section and a vascularised nucellus, complex pollen-organs, stems and rachides with a dissected stele, and frond-like leaves. Their nearest still-living relatives are the cycads.
Belotelson is a genus of crustaceans, in the extinct order Belotelsonidea, containing at least two species. It was first named by Packard in 1886 from material found in the Mazon Creek lagerstätte in Illinois. Its fossils have been found in Pennsylvanian age rocks.
Callistophytales is an extinct order of spermatophytes which lived from the Pennsylvanian to Permian periods. They were mainly scrambling and lianescent (vine-like) plants found in the wetland "coal swamps" of Euramerica and Cathaysia. Like many other early spermatophytes, they could be described as "seed ferns", combining ovule-based reproduction with pinnate leaves superficially similar to modern ferns.
Arenigiphyllum is a genus of alga from the Ordovician that falls in the coralline stem group. Only its vegetative anatomy is known.
Palaeoaplysina is a genus of tabular, calcified fossils that are a component of many Late Palaeozoic reefs. The fossil acted as a baffle to trap sediment. Historically interpreted as a sponge or hydrozoan, recent studies are converging to its classification in the coralline stem group, placing it among the red algae.
The Washington Formation is a coal, sandstone, and limestone geologic formation located in Ohio, Pennsylvania and West Virginia. It dates back to the Lower Permian period, with its base at or near the Permian/Carboniferous boundary. The Washington formation and the Dunkard Group as a whole was deposited at a time when the continents were in the process of forming the "Super Continent" Pangaea as well as a gradual drop in sea levels. The result during this period was coals being thinner and impure with high ash content. The limestones found with in the formation are exclusively freshwater deposits.
Yellow Creek is an unincorporated community in Saline Township, Jefferson County, Ohio, United States. It is located northwest of Hammondsville at the intersection of Ohio State Route 7 and Ohio State Route 213 where the Yellow Creek empties into the Ohio River, at 40°34′28″N80°40′03″W.
Septopora is an extinct genus of bryozoan belonging to the order Fenestrida. It has been found in Pennsylvanian to Permian beds in North America, South America, Australia, and southwest and east Asia.
Linoproductus is an extinct genus of brachiopod belonging to the order Productida and family Linoproductidae. Specimens have been found in Carboniferous to Permian beds in Asia, North America, and South America.
Eostaffella is an extinct genus of fusulinid belonging to the family Eostaffellidae. Specimens of the genus have been found in Carboniferous to Permian beds in Europe, Asia, and North America.
Amphissites is an extinct genus of ostracod belonging to the suborder Beyrichicopina and family Amphissitinae. Species belonging to the genus lived from the Devonian to the Permian in Europe, North America, Australia, and east Asia. The genus were likely deposit-feeders, and may have survived briefly into the Triassic.
Ichthyerpeton is an extinct genus of stegocephalian ("tetrapod") from the Pennsylvanian of Ireland. It was originally described by E.P. Wright and Thomas Henry Huxley in 1866, based on an articulated partial skeleton from the Jarrow coal seam in County Kilkenny. It was redescribed in 2021 by Aodhán Ó Gogáin and Patrick N. Wyse Jackson, who used X-ray tomography to peer through the dense coating of scales which obscures many bones. The body was very elongated, with tall diplospondylous vertebrae similar to those of embolomeres. The fossil includes a stout hindlimb with distinct digits and a proportionally short tibia. Though previously considered an embolomere, colosteid, or long-bodied temnospondyl, Ichthyerpeton has a unique combination of features which prevents an unambiguous placement among these tetrapod groups.
References
- ↑ Jun-Jie Gu, Olivier Béthoux & Dong Ren (2011). "Longzhua loculata n. gen. n. sp., one of the most completely documented Pennsylvanian Archaeorthoptera (Insecta; Ningxia, China)" (PDF). Journal of Paleontology . 85 (2): 303–314. doi:10.1666/10-085.1. S2CID 85936584. Archived from the original (PDF) on 2012-03-24.
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