Results 121 to 130 of about 704 (154)
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Quantitative conodont-based approaches for correlation of the Late Devonian Kellwasser anoxic events
Palaeogeography, Palaeoclimatology, Palaeoecology, 2007We present the trends of absolute conodont abundance, relative genera abundance, and conodont morphometrics across the Late Devonian Kellwasser horizons at three northern Gondwanan epicontinental seaway locations. At three contrasting depositional settings, the Kellwasser events are characterized by a decrease in conodont abundance, high percentage ...
Girard, Catherine, Renaud, Sabrina
openaire +4 more sources
Les ostracodes du frasnien terminal («Kellwasser supérieur) de coumiac (Montagne Noire, France)
Revue de Micropaléontologie, 1995Resume Une association particuliere de 13 especes d'ostracodes a ete decouverte dans le niveau reducteur du Frasnien terminal de Coumiac qui represente l'equivalent du calcaire superieur de Kellwasser (UKW) allemand. Cet horizon coincide avec la culmination des crises biologiques du Devonien superieur. Deux nouvelles especes du genre Samarella sont
Francis Lethiers, Jean-Georges Casier
openaire +1 more source
The Kellwasser event in Moravia
2005The intensive rebuilding of the ecosystems including the gradual extinction of the reef communities which is observed in the late Frasnian and early Famennian ages corresponds to the large restriction of the shelf areas as well as to the increase of humidity.
Jindřich Hladil +2 more
openaire +1 more source
The global Frasnian-Famennian »Kellwasser Event«
Geologische Rundschau, 1991During the UppermostP. gigas conodont zone (P. linguiformis zone) the stepwise Frasnian extinction culminates in the global transgressive-regressive Frasnian-Famennian »Kellwasser event«. Most pelagic organisms of the tropical marine environment are more or less affected by this mass extinction.
openaire +1 more source
Crises of the late devonian: the kellwasser and hangenberg events
1997Abstract Between the Late Ordovician and the next great mass extinction in the Late Devonian the world’s marine fauna was afflicted by numerous lesser extinction events. Between them, Kaljo et al. (1996) and Walliser (1996) document over 24 bio-events in this interval. These minor extinctions are beyond the scope of this book but, by the
A Hallam, P B Wignall
openaire +1 more source
Palaeobiodiversity and Palaeoenvironments, 2009
The identification of three late Frasnian conodont biozones (MN 11–12 and 13, as defined in the Montagne Noire, France) and of several Famennian conodont biozones (Early, Late, and Latest marginifera, and Late postera zones of the standard zonation) in the Palaeozoic record of the Stilo Unit (southern Calabria, southern Italy) indicates the existence ...
Pilar Navas-Parejo +4 more
openaire +4 more sources
The identification of three late Frasnian conodont biozones (MN 11–12 and 13, as defined in the Montagne Noire, France) and of several Famennian conodont biozones (Early, Late, and Latest marginifera, and Late postera zones of the standard zonation) in the Palaeozoic record of the Stilo Unit (southern Calabria, southern Italy) indicates the existence ...
Pilar Navas-Parejo +4 more
openaire +4 more sources
Senckenbergiana lethaea, 1998
Massenaussterbe-Ereignisse durchlaufen drei Phasen: Aussterben, eine Phase, in der die Populationen uberlebender Arten sich stabilisieren, und eine Phase der erneuten Ausbreitung. Bisher beschaftigen sich die meisten Untersuchungen uber solche Ereignisse — besonders im Falle der Frasne/Famenne-Grenze (Kellwasser-Event) — ausschlieslich oder uberwiegend
openaire +1 more source
Massenaussterbe-Ereignisse durchlaufen drei Phasen: Aussterben, eine Phase, in der die Populationen uberlebender Arten sich stabilisieren, und eine Phase der erneuten Ausbreitung. Bisher beschaftigen sich die meisten Untersuchungen uber solche Ereignisse — besonders im Falle der Frasne/Famenne-Grenze (Kellwasser-Event) — ausschlieslich oder uberwiegend
openaire +1 more source
Lethaia, 2013
The Frasnian–Famennian extinction witnessed the global devastation of both level-bottom and reef communities in low latitudes. Marine extinctions in offshore level-bottom communities are associated with two widespread, transgressive, anoxic ‘Kellwasser Events’ that support an anoxia–extinction link.
David P. G. Bond +3 more
openaire +1 more source
The Frasnian–Famennian extinction witnessed the global devastation of both level-bottom and reef communities in low latitudes. Marine extinctions in offshore level-bottom communities are associated with two widespread, transgressive, anoxic ‘Kellwasser Events’ that support an anoxia–extinction link.
David P. G. Bond +3 more
openaire +1 more source