Results 1 to 10 of about 22,415 (224)

Devonian basaltic magmatism of Central Alborz: An evidence for Paleo- Tethys rifting [PDF]

open access: yesپترولوژی, 2021
In the north east of Tehran province and in the Central Alborz zone, a thick basaltic horizon occurs at the boundary of Jeiroud and Mobarak Formations near the Jeiroud village and Darbandsar and Garmabdar areas, indicating a nonconformity boundary of ...
Amir Ali Tabbakh Shabani   +2 more
doaj   +1 more source

First record of conulariids from the Tērvete Formation, Upper Devonian of Latvia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2020
Phosphatized remains belonging to conulariids have been found in the Middle Famennian (Upper Devonian) deposits of the Tērvete Formation of Latvia for the first time.
Ervīns Lukševičs
doaj   +1 more source

A new Early Devonian antiarch placoderm from Belarus, and the phylogeny of Asterolepidoidei [PDF]

open access: yesActa Palaeontologica Polonica, 2023
A new asterolepidoid antiarch, Sherbonaspis talimaae sp. nov., is described based on the disarticulated skeletal elements from several boreholes in Belarus, from the Lepel Beds of the Vitebsk Formation, which has been assigned to an Early Devonian, late ...
Dmitry P. Plax, Ervins Lukševičs
doaj   +1 more source

Devonian Tentaculitoids from Brazil: extinction and stratigraphic distribution

open access: yesTerr@ Plural, 2021
The class Tentaculitoidea is an extinct group composed of small carbonate coniform-shaped invertebrates, distributed from Ordovician to Devonian. This group is more often recorded to the North Hemisphere, being less recorded to South Hemisphere deposits.
Jeanninny Carla Comniskey   +5 more
doaj   +1 more source

Was the Devonian placoderm Titanichthys a suspension feeder? [PDF]

open access: yesRoyal Society Open Science, 2020
Large nektonic suspension feeders have evolved multiple times. The apparent trend among apex predators for some evolving into feeding on small zooplankton is of interest for understanding the associated shifts in anatomy and behaviour, while the spatial ...
Samuel J. Coatham   +3 more
doaj   +1 more source

Palaeozoic correlations and the Palaeogeography of the Sibumasu (Shan-Thai) Terrane - a brief review [PDF]

open access: yesResearch & Knowledge, 2016
Furongian sandstones yield shallow-water trilobite faunas along the length of the Sibumasu Terrane in the four regions of NW Malaysia (Langkawi), southern Thailand (Satun), the Shan States of Myanmar and the Baoshan Block of western Yunnan.
Clive Burrett   +2 more
doaj   +1 more source

Organic-walled tentaculids of Late Devonian (Frasnian) deposits of the Appalachian and Michigan Basins, Laurussia (NY, MI, OH)

open access: yesGeologica Acta, 2022
This is the first report of organic-walled tentaculid remains from Givetian through Frasnian age deposits of the Michigan and Appalachian Basins in western Laurussia.
Kimberly C. Meehan, James T. Boyle
doaj   +1 more source

A new look at the Emsian (Early Devonian), sarcopterygian fishes from the Holy Cross Mountains, Poland, with a special reference to porolepiforms

open access: yesActa Palaeontologica Polonica, 2023
Sarcopterygian remains are relatively common in the so-called “Placoderm Sandstone” (storm-origin bone-bearing breccia) from the Emsian (Lower Devonian) of Podłazie in the Holy Cross Mountains (Poland).
OLGA WILK
doaj   +1 more source

New investigations of Upper Devonian wood from the north of the European part of Russia

open access: yesActa Palaeobotanica, 2020
The paper describes a continuation of our research on the distribution of archaeopteridalean plants in the north of the European part of the Russian Federation.
Anna Lyubarova, Sergey M. Snigirevsky
doaj   +1 more source

Fish assemblages from the Middle–Upper Devonian of the Middle Urals, Russia

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2022
New assemblages of diverse fishes from the Givetian–Famennian were described in six sections in the Middle Urals: Pokrovskoe, Baronskaya, Sulem, Pershino, Yokva, and Vilva.
A.O. Ivanov
doaj   +1 more source

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