Results 11 to 20 of about 35,427 (310)

Acherontiscus caledoniae: the earliest heterodont and durophagous tetrapod [PDF]

open access: yesRoyal Society Open Science, 2019
The enigmatic tetrapod Acherontiscus caledoniae from the Pendleian stage of the Early Carboniferous shows heterodontous and durophagous teeth, representing the earliest known examples of significant adaptations in tetrapod dental morphology. Tetrapods of
Jennifer A. Clack   +5 more
doaj   +1 more source

Biostratigraphy of the Upper Devonian–Lower Carboniferous deposits in Til-Abad section, northeast Shahrud, Eastern Alborz [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2020
The biostratigraphy of Devonian–Carboniferous (D/C) boundary of Til-Abad section in Eastern alborz is carried out in this study. The studied section is located about 85 km of northeast Shahrud city and close to the Shahrud–Azadshahr road.
Tahere Parvizi   +3 more
doaj   +1 more source

Sedimentary facies of clastic-platform carbonate sediment strata of epicontinental sea in the Daniudi Gasfield, Ordos Basin

open access: yesNatural Gas Industry B, 2021
Mixed deposition is a sedimentary phenomenon of special significance to the tectonic movement, material supply, sea level change, and paleoclimate of the sedimentary environment.
Guangquan Zhang, Lidong Mi
doaj   +1 more source

A platysomid occurrence from the Tournaisian of Nova Scotia

open access: yesScientific Reports, 2021
The Hangenberg extinction has been hypothesized as a first order event in vertebrate evolution; however, information on the earliest Carboniferous vertebrate fauna, crucial in evaluating biodiversity changes, is scarce.
Conrad D. Wilson   +2 more
doaj   +1 more source

Analysis of the Importance of Extension in Accounting for the Post-Carboniferous Subsidence of the North Sea Basin [PDF]

open access: yes, 1986
Post Carboniferous sedimentary deposition in the Central North Sea basins can be separated into three major periods: Permian, Triassic and mid-Jurassic through present.
Hellinger, Steven J.   +2 more
core   +1 more source

The lower actinopterygian fauna from the Lower Carboniferous Albert shale formation of New Brunswick, Canada – a review of previously described taxa and a description of a new genus and species [PDF]

open access: yes, 2017
The Lower Carboniferous Albert shale formation of New Brunswick, Canada, is well-known for the preservation of countless articulated lower actinopterygian palaeoniscoid fishes. This site is at the boundary between the Devonian and the Lower Carboniferous,
Mickle, Kathryn E.
core   +2 more sources

Bivalves and brachiopods in the Carboniferous - Early Permian of Argentine Precordillera: Diversification and faunal turnover in Southwestern Gondwana [PDF]

open access: yes, 2010
Diversification patterns and faunistic turnovers of bivalves and brachiopods through the Carboniferous - Early Permian interval in the central western Argentinian basins are analyzed and compared with the global events proposed in former studies.
Cisterna, Gabriela Adriana   +1 more
core   +3 more sources

Early Carboniferous (Early Viséan – Serpukhovian) Palynomorphs

open access: yesJournal of Micropalaeontology, 1985
Abstract. Well preserved assemblages of Early Carboniferous miospores have been recovered from a number of wells including A1–NC92, A1–37, A1 A–84, B1–2, G1–82, B1–14 and J1–81A. In some cases the palynomorph assemblages are quantitatively sparse and frequently show evidence of reworking of Late Devonian forms.
Clayton, G., Loboziak, S.
openaire   +2 more sources

Biostratigraphy of the Upper Devonian-Lower Carboniferous deposits in Mighan section, northeast Shahrood, Eastern Alborz [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2019
The Devonian/Carboniferous (DC) transition is characterized by several transgressive/regressive cycles which led to a widespread ocean anoxia known as the Hangenberg Black Shale Event (HBS), close to the D/C boundary a major sea-level fall (Hangenberg ...
Tahere Parvizi   +3 more
doaj   +1 more source

The fossil record of early tetrapods: worker effort and the end-Permian mass extinction [PDF]

open access: yes, 2010
It is important to understand the quality of the fossil record of early tetrapods (Tetrapoda, minus Lissamphibia and Amniota) because of their key role in the transition of vertebrates from water to land, their dominance of terrestrial faunas for over ...
Bebber D.F.   +18 more
core   +3 more sources

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