Results 81 to 90 of about 1,663 (126)
Givetian (Middle Devonian) historical bio- and chronostratigraphical subdivisión base don conodonts [PDF]
The conodont record supports the intended threefold subdivision of the Givetian as envisaged by the International Subcommision on Devonian Stratigraphy into Lower, Middle and Upper Givetian substages.
Valenzuela Ríos, José Ignacio +1 more
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Middle Devonian (Givetian) megaspores from Belgium (Ronquières) and Libya (A1-69 borehole) [PDF]
Carnets de Géologie, 2007 peer reviewedPreliminary results are presented on newly discovered megaspore assemblages recovered from Givetian localities at Ronquières, Belgium, and a borehole (A1-69) drilled in the Ghadames Basin, Libya, by SHELL in 1959.
Ville de Goyet Frédéric de +5 more
doaj +2 more sources
Литосфера, 2016 The main features of the Givetian-Frasnian shoal deposits of the Sub-Polar Urals (Matyashor formation) are considered. The study part of the section corresponds to varcus - rhenana zones on the basis of conodonts.
D. A. Gruzdev +3 more
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, 2021 A comparison between microfacies and magnetic susceptibility (MS) curves has been performed at the Givetian-Frasnian transition in southern Belgium. The MS curve is subdivided in four magnetic sequences.
Devleeschouwer, X. +3 more
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Investigating a Devonian vertebrate assemblage with synchrotron microtomography of coprolites
Scientific ReportsFossilised faeces (coprolites) are a unique source of information as they record palaeontological evidence of animal behaviour (autecology) as well as interactions between extinct organisms and their environment (synecology).
Arnaud Rebillard +3 more
doaj +1 more source
Occurrence of subnormal size phenotype in the latest Eifelian/earliest Givetian boundary, Tibagi city, Paraná State, Brazil: taphonomic and paleosynecologic implications [PDF]
Boletim do Museu Paraense Emílio Goeldi. Ciências Naturais, 2010 Subnormal size phenotype of marine invertebrates is recorded at the interval Neo-Eifelian/eo-Givetian (Devonian). These fossils represent a relictual fauna that resulted from a biotic crisis.
Andressa Carla Penteado +4 more
doaj
New acritarch taxa from the Middle and Upper Devonian (Givetian–Frasnian) of western Canada
, 1991 Eight new acritarch species, four of which are assigned to new genera, are described from Givetian and Frasnian strata of Alberta and the Northwest Territories. The new taxa are Apectosphaeridium apoplanium n.gen. et sp., Asyncosmium isum n.gen. et sp.,
Robert E. Turner
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Tullypothyridina, new late Givetian rhynchonellid (brachiopod) genus [PDF]
, 2003 A new genus, Tullypothyridina, type species T. venustula (HALL, 1867), is described from the late Givetian of central New York, Pennsylvania, eastern Kentucky, and probably eastern Iowa.
Sartenaer, P.
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The leperditiid-charophyte assemblage from the Givetian of Dębnik and its stratigraphic value [PDF]
, 1987 The peculiar ostracode-charophyte assemblage, discovered in the limestone intercalation within the Zbrza Dolostone of the Dębnik anticline, Cracow Upland (southern Poland), is composed of abundant leperditiid ostracodes, Briartina obtusa (JONES ...
Racka, Maria +2 more
core
Известия высших учебных заведений: Геология и разведка, 2016 Studying of the subvolcanic bodies from the Late Givetian gabbro-diabase complex has revealed heterogeneity of the given group: some bodies have cross-cut ore mineralization, while the others are superimposed by the mineralization.
E. I. Yartsev, N. N. Shatagin
doaj +2 more sources