Results 71 to 80 of about 1,559 (216)

Hulterstad brachiopods and associated faunas in the Vormsi Stage (Upper Ordovician, Katian) of the Lelle core, Central Estonia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2007
Integrated palaeontological and sedimentological study of the Upper Ordovician Vormsi Stage in the Lelle drill core section, Central Estonia, revealed an association of shelly fauna containing the endemic saukrodictyid brachiopod Hulterstadia cor (Wiman),
Nõlvak, Jaak   +3 more
doaj  

New evidence for the Hirnantian (Upper Ordovician) in Belgium? An integrated isotopical, biostratigraphic and sedimentologic approach

open access: yesCarnets de Géologie, 2005
The Hirnantian is an important time in Earth history as it includes one of the major episodes of continental glaciation and marine mass extinction (e.g. Brenchley et alii, 1994).
Grassineau Nathalie   +4 more
doaj  

Biostratigraphy of Acritarchs and Chitinozoans in Ordovician Strata from the Fazel Abad Area, Southeastern Caspian Sea, Alborz Mountains, Northern Iran: Stratigraphic Implications [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2017
Sixty-four surface samples from the Lower Palaeozoic rock units (mainly Lalun,Abastu and Abarsaj formations) near Kholin-Darreh village in the Fazel Abad area,southeastern the Caspian Sea, Northern Iran, were analyzed to determine their agerelationships.
M. Ghavidel-syooki
doaj  

Climate change and the selective signature of the Late Ordovician mass extinction [PDF]

open access: yes, 2012
Selectivity patterns provide insights into the causes of ancient extinction events. The Late Ordovician mass extinction was related to Gondwanan glaciation; however, it is still unclear whether elevated extinction rates were attributable to record ...
Finnegan, Seth   +3 more
core   +3 more sources

Опыт участия в международном летнем кампусе РАНХиГС 2017 [PDF]

open access: yes, 2007
Extraordinarily well-preserved chitinozoans from an Upper Silurian sedimentary sequence in south-east Turkey were recovered from different depth levels, hand-picked from the palynological residue, cleaned and analysed by micro-FTIR and Curie point ...
BROCKE, R   +5 more
core   +2 more sources

New insights on the Hirnantian palynostratigraphy of the rio Ceira section, Buçaco, Portugal [PDF]

open access: yes, 2014
The Lower Palaeozoic successions of Portugal are well represented in the Central Iberian Zone (Cll), one of the main tectonostratigraphic domains of the Iberian Massif.
Fernandes, Paulo   +5 more
core  

Pre-Cambrian to Palaeozoic Palaeopalynology and Palaeobotany

open access: yesCarnets de Géologie, 2005
A set of 14 abstracts and short papers (extended abstracts) of presentations given at a meeting organized by the NFSR Working Group, "Micropaléontologie végétale et Palynologie (MVP)", held on May 11, 2005 at the University of Liège, Belgium.
Steemans Philippe, Javaux Emmanuelle
doaj  

Review of the lithostratigraphy of the Middle Ordovician to Llandovery of the Condroz inlier (Belgium) by chitinozoan biostratigraphy: does the sedimentary succesion records the Ardennian deformation? [PDF]

open access: yes, 2007
This paper reports on chitinozoans from the early Llanvirn (mid Darriwilian) Huy Formation found at three localities in the central Condroz Inlier: the Huy and Sart-Bernard railway sections and the Wépion borehole.
Vanmeirhaeghe, J.
core  

Late Ordovician scolecodonts and chitinozoans from the Pin Valley in Spiti, Himachal Pradesh, northern India [PDF]

open access: yesActa Palaeontologica Polonica
The end of the Ordovician witnessed major perturbations in the ecosystem, seriously affecting global marine biodiversity. Nevertheless, some marine organism groups and their crisis-bound palaeogeographic distribution are still understudied.
PETRA TONAROVÁ   +8 more
doaj   +1 more source

Correlation of the 83w421 Kortrijk (Sint-Antonius) and 83w44 Kortrijk (Lust) boreholes with acritarchs (late Aeronian-early Telychian, Silurian, Belgium) [PDF]

open access: yes, 2006
25 samples from the 83W421 Kortrijk (Sint-Antonius) and 83W44 Kortrijk (Lust) boreholes are investigated. Acritarchs provide a more reliable and precise correlation of these two boreholes than graptolites and chitinozoans because of large barren and/or ...
Wauthoz, B.
core  

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