Results 1 to 10 of about 34,448 (232)

Morphology and Nomenclature of Barsassia (Lycopsida) from the Middle Devonian of West Junggar, Xinjiang, China [PDF]

open access: yesPlants, 2021
Morphology and nomenclature are essential issues of botany, in which both extant and fossil plant taxa follow the same nomenclature code. Devonian (419.2–358.9 Ma) herbaceous lycopsid Barsassia, one of the earliest coal-forming plants in geological ...
Bingcai Liu   +4 more
doaj   +2 more sources

Paleotemperature record of the Middle Devonian Kačák Episode. [PDF]

open access: yesSci Rep, 2021
AbstractThe Middle Devonian Epoch, ~ 393–383 million years ago, is known for a peak in diversity and highest latitudinal distribution of coral and stromatoporoid reefs. About 388 million years ago, during the late Eifelian and earliest Givetian, climax conditions were interrupted by the polyphased Kačák Episode, a short-lived period of marine dys ...
Suttner TJ   +8 more
europepmc   +8 more sources

An investigation of the genus Mesacanthus (Chordata: Acanthodii) from the Orcadian Basin and Midland Valley areas of Northern and Central Scotland using traditional morphometrics [PDF]

open access: yesPeerJ, 2015
Mesacanthus is a common and speciose genus of acanthodian fish from Lower Old Red Sandstone and Middle Old Red Sandstone assemblages (representing the Lower Devonian and Middle Devonian respectively) and is well represented in many palaeoichthyology ...
Matthew G. Baron
doaj   +7 more sources

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   +2 more sources

Early sarcopterygian morphological disparity through the Devonian-Carboniferous crisis [PDF]

open access: yesScientific Reports
Major morphological adaptations characterized the early evolutionary history of sarcopterygians during the Devonian (419–359 Ma) and the Carboniferous (359–299 Ma), punctuated by environmental changes and biodiversity crises.
Olivia Vanhaesebroucke   +2 more
doaj   +2 more sources

Devonian–Mississippian magmatism related to extensional collapse in Svalbard: implications for radiating dyke swarms [version 1; peer review: 2 approved] [PDF]

open access: yesOpen Research Europe
Background Despite extensive studies of the Mesozoic–Cenozoic magmatic history of Svalbard, little has been done on the Paleozoic magmatism due to fewer available outcrops.
Gillian R. Foulger   +3 more
doaj   +2 more sources

Middle–Late Devonian conodont fauna of the Bahram Formation in the Shahzadeh Mohammad section, North of Kerman [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2021
Devonian deposits of the Bahram Formation with a thickness of 300 m were studied based on conodont fauna in Shahzadeh Mohammad section (33 km east of Zarand, 95 km north of Kerman city) in central Iran structural Zone.
Fattaneh Zamani   +5 more
doaj   +1 more source

Perspectives for oil and gas Paleozoic bearing strata on the junction area of the Pre-Caspian and Volga-Ural petroleum Provinces [PDF]

open access: yesНефтегазовая геология: Теория и практика, 2022
The junction zone of such large tectonic structures as the Volga-Ural anteclise, Precaspian depression and Pre-Ural foredeep is characterized by a very complex tectonic structure, history of geological development and formation at different phases of ...
Fortunatova N.K.   +11 more
doaj   +1 more source

DEVONIAN-CARBONIFEROUS MAGMATISM AND METALLOGENY IN THE SOUTH URAL ACCRETIONARY-COLLISIONAL SYSTEM

open access: yesГеодинамика и тектонофизика, 2021
The oceanic stage in the history of the South Urals completed in the Ordovician – Early Silurian. The Ordovician through Devonian events in the region included the formation of an island arc in the East Ural zone from the Middle Ordovician to Silurian ...
A. M. Kosarev   +9 more
doaj   +1 more source

The Early Devonian (Emsian) acrotretid microbrachiopod Opsiconidion minor Popov, 1981, from the Alaska/Yukon Territory border and Novaya Zemlya [PDF]

open access: yesEstonian Journal of Earth Sciences, 2020
New records of the poorly known acrotretid (Biernatidae) microbrachiopod Opsiconidion minor Popov are described from middle Emsian strata of the Ogilvie Formation in east-central Alaska and the adjacent Yukon Territory, Canada, and compared with new ...
Lars E. Holmer   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy