Buscar
Mostrando ítems 1-4 de 4
New insights into the paleobiogeography of the Early Ordovician graptolite fauna of northwestern ArgentinaNouveau regard sur la paléobiogéographie de la faune de graptolites de l’Ordovicien inférieur de l’Argentine nord-occidentale
(Elsevier France-editions Scientifiques Medicales Elsevier, 2012-07)
A multivariate analysis was used to determine the faunistic relationships of the northwestern Argentinean graptolite faunas of Floian age to faunas from Baltica, Avalonia, Laurentia and SW China. A statistical analysis at ...
Lower Ordovician (late Tremadocian?- Floian) palynomorphs from the Llanos Basin, Colombia: Biostratigraphic and paleogeographic significance
(Elsevier Science, 2019-06)
Four core and fifteen cutting samples of well RH-2 from the Ordovician of the Llanos Basin, Colombia, were palynologically analyzed. They yielded mostly diverse and well-preserved marine palynomorph assemblages, dominated ...
Early–Middle Ordovician Graptolites from the Argentine Puna: Quantitative Paleobiogeographic Analysis Based on a Systematic RevisionGraptolitos del ordovícico temprano–medio de la puna argentina: Análisis paleobiogeográfico cuantitativo basado en una revisión sistemática
(Asociación Paleontológica Argentina, 2020-12)
. La revisión taxonómica actualizada de los graptolitos del Ordovícico Temprano–Medio de la Puna Oriental de Argentina permite describir por primera vez Sigmagraptus praecursor, Baltograptus extremus, B. geometricus, B. ...
Biostratigraphy and paleogeography of Middle-Late Ordovician palynomorphs from the Llanos Basin, Colombia
(Elsevier Science, 2021-03)
Diverse and moderately to well-preserved palynomorph assemblages, composed of 81 organic-walled phytoplankton species, belonging to 47 genera, and two chitinozoan species, were recorded from the Ordovician rocks of the ...