Results 1 to 10 of about 8,625 (202)

Lower Jurassic conodonts from the Inuyama area of Japan: implications for conodont extinction

open access: yesFrontiers in Ecology and Evolution, 2023
It is generally accepted that conodonts went extinct at the end of the Triassic, but younger conodont fossils have been reported, and it is becoming clear that conodont extinction occurred asynchronously across different regions. Although some reports of
Yixing Du   +4 more
doaj   +2 more sources

Growth and feeding ecology of coniform conodonts [PDF]

open access: yesPeerJ, 2021
Conodonts were the first vertebrates to develop mineralized dental tools, known as elements. Recent research suggests that conodonts were macrophagous predators and/or scavengers but we do not know how this feeding habit emerged in the earliest coniform ...
Isabella Leonhard   +4 more
doaj   +3 more sources

Upper Norian conodonts from the Baoshan block, western Yunnan, southwestern China, and implications for conodont turnover [PDF]

open access: yesPeerJ, 2023
The Sevatian of the late Norian is one of the key intervals in biotic turnover and in changes of paleoclimate and paleoenvironments. Conodont faunas recovered from two sections of upper Norian strata of the Dashuitang and Nanshuba formations near Baoshan
Weiping Zeng   +5 more
doaj   +3 more sources

Conodonts

open access: yesFundamentals of Invertebrate Palaeontology, 2019
Sreepat Jain
semanticscholar   +3 more sources

Boundary between the Porkuni and Juuru regional stages in the Neitla section, Estonia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Conodonts and chitinozoans were studied from the Neitla section, which exposes the boundary between the Porkuni and Juuru regional stages. This level, although not proved biostratigraphically, has been traditionally considered to correspond to the ...
Peep Männik, Jaak Nõlvak
doaj   +1 more source

Biostratigraphy, biofacies, and palaeoecology of the Upper Devonian deposits (Khoshyeilagh Formation) based on conodonts in the northeast of Iran (around Bojnord and Jajarm) [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2021
In this study, the paleoecology, biostratigraphy, and biofacies of the Khoshyeilagh Formation hve been evaluated based on the found conodont species. The Khoshyeilagh Formation includes terrigenous-carbonate sequences, which contain conodonts of shallow ...
Fatemeh Jafarbeigloo   +4 more
doaj   +1 more source

New contributions to the Ordovician biostratigraphy of the Western Precordillera, Argentina [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Upper Ordovician graptolites and conodonts are recorded from the Yerba Loca Formation in two sections, in the El Toro and Las Viudas creeks, from the El Tigre Range in the Western Precordillera of San Juan Province, Argentina. A collection of graptolites
Fernando E. Lopez   +3 more
doaj   +1 more source

THE OLENEKIAN-ANISIAN/EARLY-MIDDLE TRIASSIC BOUNDARY, AND ASSESSMENT OF THE POTENTIAL OF CONODONTS FOR CHRONOSTRATIGRAPHIC CALIBRATION OF THE TRIASSIC TIMESCALE

open access: yesActa Palaeontologica Romaniae, 2021
The conodont Chiosella timorensis (Nogami, 1968) has for a long time been considered to be a suitable biotic proxy for the Olenekian-Anisian/Early-Middle Triassic boundary. The recently acquired ammonoid record around that boundary clearly shows that the
E. Grădinaru
semanticscholar   +1 more source

Automatic identification of conodont species using fine-grained convolutional neural networks

open access: yesFrontiers in Earth Science, 2023
Conodonts are jawless vertebrates deposited in marine strata from the Cambrian to the Triassic that play an important role in geoscience research. The accurate identification of conodonts requires experienced professional researchers. The process is time-
Xiong Duan, Xiong Duan
doaj   +1 more source

From shallow-water carbonate ramp to hemipelagic deep-marine carbonate deposition: Part 2. Sirogojno (Klisura quarry) - the reference section of the Middle to Late Anisian Bulog sedimentary succession in the Inner Dinarides (SW Serbia) [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2023
The Middle to Late Anisian sedimentary succession preserved in the Klisura quarry in Sirogojno (Zlatibor Mt., SW Serbia) preserves the most complete deepening depositional history in the Inner Dinarides in Serbia.
Sudar Milan   +5 more
doaj   +1 more source

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