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Late Devonian palaeobiogeography of marine organic-walled phytoplankton
Palaeogeography, Palaeoclimatology, Palaeoecology, 2019Abstract Acritarchs and prasinophytes have generally been considered as organic-walled phytoplankton, and their distribution patterns play a significant role in palaeogeographical and palaeoclimatical reconstructions. In this paper the palaeobiogeography of Late Devonian phytoplankton (mainly Famennian) is quantitatively analyzed based on a global ...
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Climate of the Late Devonian to Triassic
Palaeogeography, Palaeoclimatology, Palaeoecology, 1993Abstract Remarkable changes are apparent in climate during Late Devonian-Triassic times. Mostly the climate was rather different from the present. The faunas and floras offer much evidence for understanding the climate but, in turn, understanding the palaeogeography of the faunas and floras is dependent on understanding the climate and the changes in
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Late Devonian Conodonts from Alberta Subsurface: ABSTRACT
AAPG Bulletin, 1966Cores from four wells in mid-southern Alberta have yielded diverse and abundant conodont faunas. Large numbers of specimens were recovered from Upper Devonian strata assigned to the Wabamun Group (Famennian) and the stratigraphically lower Winterburn Group, Woodbend Group, and Beaverhill Lake Formation (Frasnian).
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The late Frasnian (Upper Devonian) Kellwasser Crisis
2005Detailed investigations of sequences containing the Kellwasser Bio-event near the Frasnian-Famennian boundary demonstrate a stepwise character of influences on different groups of organisms over a time span of more than 1 my. Therefore the term Kellwasser Crisis (KW Crisis) is introduced. Extraordinary episodes of the KW Crisis, like e.g.
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Late Early Devonian Dacryoconarid Tentaculites, Northern Yukon Territory
Canadian Journal of Earth Sciences, 1972The late Early Devonian succession in northern Yukon Territory contains a well-preserved dacryoconarid tentaculite fauna dominated by Turkestanella acuaria (Richter) in the upper part of the Road River Formation and T. acuaria and Nowakia parabarrandei Churkin and Carter in the overlying Michelle Formation. Based on the dacryoconarid tentaculite fauna
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Late Devonian vertebrate fauna of the South Urals
Geobios, 1995Abstract Vertebrate remains have been discovered in the Frasnian and Famennian of the South Urals The ichthyofaunacontains representatives of Phoebodus; Stethacanthus; Symmorium; Protacrodus as well as placoderms; acanthodians; “crossopterygians” dipnoans and palaoniscids. Changes of the fish assemblages are examined. A review of the occurrences of
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Chapter 3 Modelling late devonian extinction hypotheses
2005Abstract Modelling the conditions of extinction hypotheses can lead to the discernment of the critical observations that must be made in order to definitively test those hypotheses. Models considered here are based upon the beginning ning assumption that the end-Frasnian biodiversity crisis was triggered in large part by pulses of global cooling ...
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Insight into lingulid evolution from the Late Devonian
Alcheringa: An Australasian Journal of Palaeontology, 1977Well preserved lingulids from near the base of the Mandagery Sandstone in the Late Devonian Hervey Group, N.S.W. are described as Apsilingula parkesensis gen. et sp. nov. The internal structures are better preserved than those of any previously described Palaeozoic lingulid and it has been possible to reconstruct the muscle system and to demonstrate a ...
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Late Devonian, Permian and Triassic Phytoliths from Antarctica
Micropaleontology, 1999This paper documents the discovery of phytoliths (siliceous plant fossils) from late Devonian, Permian and Triassic Beacon Supergroup strata at Mts. Crean and Feather in the Transantarctic Mountains, Antarctica. The five phytolith forms documented here are among the oldest phytoliths reported to date.
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