Results 181 to 190 of about 4,368 (245)

Palaeobiogeography of Famennian (Late Devonian) bryozoans

Palaeogeography, Palaeoclimatology, Palaeoecology, 2010
Abstract Bryozoans were widely distributed in marine habitats of the Famennian (Late Devonian) worldwide. This time interval was marked by gradual change in taxonomic composition of bryozoan faunas, which were insignificantly affected by global events (Upper Kellwasser, Handerberg). Distribution of bryozoan faunas was controlled by intrinsic factors (
Zoya A Tolokonnikova, Andrej Ernst
exaly   +2 more sources

Famennian crinoids and blastoids (Echinodermata) from Mongolia

Palaeobiodiversity and Palaeoenvironments, 2020
Herein we report on the most abundant and diverse fauna of Palaeozoic crinoids and blastoids collected from Mongolia to date. The fauna is from the Late Devonian (Famennian) Samnuuruul Formation in western Mongolia. The fauna consists of two genera of blastoids and twelve genera of crinoids—four genera of camerates, three genera of flexibles, one ...
J. A. Waters, J. W. Waters, P. Königshof, S. K. Carmichael, M. Ariuntogos   +4 more
openaire   +2 more sources

Frasnian–Famennian biotic crisis: undervalued tectonic control?

Palaeogeography, Palaeoclimatology, Palaeoecology, 1998
The prime cause of the Late Devonian Kellwasser crisis, culminating in a mass extinction event near the Frasnian–Famennian (F–F) boundary, remains conjectural. Nevertheless, rapid sea-level fluctuations of uncertain origin during tectono-eustatic highstand, paired with repeated oceanic anoxia and climatic changes, are usually thought at present to be ...
Grzegorz Racki
exaly   +2 more sources

Magnetostratigraphy susceptibility of the Frasnian/Famennian boundary

Palaeogeography, Palaeoclimatology, Palaeoecology, 2002
Magnetosusceptibility event and cyclostratigraphy (MSEC) is used to establish a non-polarity-based magnetostratigraphy susceptibility (MSS) between the stratotype region for the Frasnian/Famennian (F/F) boundary sequence in the Montagne Noire of southern France, the eastern Rheinisches Schiefergebirge of Germany, Belgium, the eastern Anti-Atlas of ...
Rex E Crick, Brooks B Ellwood, Raimund Feist, Ahmed El Hassani, Eberhard Schindler, Roland Dreesen, D.Jeffrey Over, Catherine Girard   +7 more
semanticscholar   +3 more sources

A volcanic scenario for the Frasnian–Famennian major biotic crisis and other Late Devonian global changes: More answers than questions?

Global and Planetary Change, 2020
Although the prime causation of the Late Devonian Frasnian–Famennian (F–F) mass extinction remains conjectural, such destructive factors as the spread of anoxia and rapid upheavals in the runaway greenhouse climate are generally accepted in the Earth ...
Grzegorz Racki
exaly   +2 more sources

New and revised cyrtospiriferid (Spiriferida) brachiopods from the lower Famennian (Upper Devonian) of Armenia

Journal of Paleontology, 2022
. The Upper Devonian sedimentary sequences of Central Armenia, which mainly consist of shallow water, mixed carbonate-siliciclastic deposits, contain abundant and diverse brachiopods that are dominated by spiriferides.
V. Serobyan, T. Danelian, C. Crônier, A. Grigoryan, Bernard Mottequin   +4 more
semanticscholar   +1 more source

Lower Famennian (Upper Devonian) rhynchonellide and athyride brachiopods from the South Armenian Block

Journal of Paleontology, 2021
.— The lower Famennian ‘Cyrtospirifer’ orbelianus brachiopod Zone established in Armenia by Abrahamyan (1957) (coeval to the crepida conodont Zone) contains an abundant and diverse brachiopod fauna that still remains poorly studied.
V. Serobyan, T. Danelian, C. Crônier, A. Grigoryan, Bernard Mottequin   +4 more
semanticscholar   +1 more source

Famennian conodonts from the Hongguleleng Formation at the Bulongguoer stratotype section, western Junggar, Northwest China

Palaeoworld, 2021
The Hongguleleng Formation, the highest and most important Devonian marine carbonate horizon in western Junggar, contains an endemic shallow-water Icriodus–Polygnathus conodont fauna with rare palmatolepids and other genera.
Xinsong Zhang, D. Over, Y. Gong
exaly   +2 more sources

Famennian charcoal of Belgium

Palaeogeography, Palaeoclimatology, Palaeoecology, 2010
Abstract Charcoal results from an incomplete combustion of biological material in anoxic conditions and has a high potential for three-dimensional cellular preservation. Most of the Belgian Upper Devonian flora is known through compression fossils, mainly from the siliciclastic Evieux Formation; no charcoal-bearing layers had been reported to date ...
Prestianni, Cyrille, Decombeix, Anne-laure, Thorez, Jacques, Fokan, Damien, Gerrienne, Philippe   +4 more
openaire   +2 more sources

Estuarine fish and tetrapod evolution: insights from a Late Devonian (Famennian) Gondwanan estuarine lake and a southern African Holocene equivalent

Biological Reviews of The Cambridge Philosophical Society, 2020
The Waterloo Farm lagerstätte in South Africa provides a uniquely well‐preserved record of a Latest Devonian estuarine ecosystem. Ecological evidence from it is reviewed, contextualised, and compared with that available from the analogous Swartvlei ...
R. Gess, A. Whitfield
semanticscholar   +1 more source