Results 81 to 90 of about 1,559 (216)

Katian (Upper Ordovician) conodonts from Wales [PDF]

open access: yes, 2013
Middle and upper Katian conodonts were previously known in the British Isles from relatively small collections obtained from a few localities. The present study is mainly based on 17 samples containing more than 17 000 conodont elements from an ...
An   +85 more
core   +1 more source

Extent and duration of marine anoxia during the Frasnian– Famennian (Late Devonian) mass extinction in Poland, Germany, Austria and France [PDF]

open access: yes, 2004
– The intensity and extent of anoxia during the two Kellwasser anoxic events has been investigated in a range of European localities using amultidisciplinary approach (pyrite framboid assay, gamma-ray spectrometry and sediment fabric analysis).
Bond, D.P.G., Racki, G., Wignall, P.B.
core   +1 more source

Shallow-marine testate amoebae with internal structures from the Lower Devonian of China. [PDF]

open access: yesiScience, 2023
Wang K   +7 more
europepmc   +1 more source

The position of graptolites within Lower Palaeozoic planktic ecosystems. [PDF]

open access: yes, 1993
An integrated approach has been used to assess the palaeoecology of graptolites both as a discrete group and also as a part of the biota present within Ordovician and Silurian planktic realms.
Allison P.A.   +85 more
core   +1 more source

Dados palinoestratigráficos preliminares do Gorstiano, Silúrico, da Formação de Sazes, Sinclinal do Buçaco = Preliminary palynostratigraphic data from the Gorstian, Silurian, Sazes Formation, Buçaco Syncline [PDF]

open access: yes, 2010
Novos dados bioestratigráficos foram obtidos na sucessão estratigráfica do Paleozóico Inferior da região do Buçaco. A Formação de Sazes (Silúrico) está a ser estudada ao nível palinológico (miosporos e quitinozoários) e de macrofósseis (graptólitos ...
Fernandes, Paulo   +5 more
core  

Estado da Arte nos Quitinozoários: Designação da Ordem, Afinidades Biológicas, Paleoambiente e Breve Histórico no Âmbito das Bacias do Amazonas e do Paraná [PDF]

open access: yesAnuário do Instituto de Geociências, 2005
Interpretados sob diversas óticas variando conforme o pensamento científico dos pesquisadores, os quitinozoários constituem um grupo enigmático tanto no que diz respeito ao seu significado como as suas afinidades biológicas.
Hilda Leonor Coevas de Azevedo-Soares   +1 more
doaj  

Acritarchs from the Abbaye de Villers and Tribotte Formations in their type section of the Thyle river valley (Middle Ordovician, Brabant Massif, Belgium) and their stratigraphic implications [PDF]

open access: yes, 2011
Reinvestigation of the Thyle river section, in the southern part of the Brabant Massif, has led to a better understanding of acritarch distribution in the Middle Ordovician Abbaye de Villers and Tribotte formations, and their stratigraphical significance
Vanguestaine, M., Wauthoz, B.
core  

On the taxonomic resolution of pollen and spore records of Earth’s vegetation [PDF]

open access: yes, 2014
Premise of research. Pollen and spores (sporomorphs) are a valuable record of plant life and have provided information on subjects ranging from the nature and timing of evolutionary events to the relationship between vegetation and climate.
Mander, Luke, Punyasena, Surangi W.
core   +1 more source

Dados palinoestratigráficos preliminares do Gorstiano (Silúrico) da Formação de Sazes (Sinclinal do Buçaco) [PDF]

open access: yes, 2014
Novos dados bioestratigráficos foram obtidos na sucessão estratigráfica do Paleozóico Inferior da região do Buçaco. A Formação de Sazes (Silúrico) está a ser estudada ao nível palinológico (miosporos e quitinozoários) e de macrofósseis (graptólitos ...
Fernandes, Paulo   +5 more
core  

A new species of Conchicolites (Cornulitida, Tentaculita) from the Wenlock of Gotland, Sweden [PDF]

open access: yes, 2014
A new cornulitid species, Conchicolites crispisulcans sp. nov., is described from the Wenlock of Gotland, Sweden. The undulating edge of C. crispisulcans sp. nov. peristomes is unique among the species of Conchicolites. This undulating peristome edge may
Axel Munnecke   +2 more
core   +1 more source

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