نتایج جستجو برای: campanian

تعداد نتایج: 532  

Journal: :Comptes Rendus Geoscience 2023

The Poigny borehole near Provins (Seine-et-Marne) provides the most complete single pristine section through Upper Cretaceous Chalk of Paris Basin. A well preserved and diverse palynoflora including 236 species subspecies organic-walled dinoflagellate cysts (dinocysts) is documented from borehole, together with a high-resolution carbon-isotope curve (δ 13 C carb ) for Coniacian–Campanian interv...

Journal: :Proceedings. Biological sciences 2005
M H Schweitzer L Chiappe A C Garrido J M Lowenstein S H Pincus

Exceptionally preserved sauropod eggshells discovered in Upper Cretaceous (Campanian) deposits in Patagonia, Argentina, contain skeletal remains and soft tissues of embryonic Titanosaurid dinosaurs. To preserve these labile embryonic remains, the rate of mineral precipitation must have superseded post-mortem degradative processes, resulting in virtually instantaneous mineralization of soft tiss...

2012
ALEXANDER AVERIANOV GARETH J. DYKE

A dentary fragment containing the last two molars (m2-3) from the Late Cretaceous (Santonian-?Campanian) Bostobe Formation exposed at the locality of Shakh Shakh, northeast Aral Sea region, Kazakhstan, is attributed to a new taxon of Zhelestidae, Zhalmouzia bazhanovi, gen. et sp. nov. This specimen is only the second mammal described from Shakh Shakh, the unidentifiable eutherian Beleutinus orl...

Journal: :Bulletin of the Geological Society of Denmark 2002

Planktonic foraminifera and major palynomorph groups (i.e. terrestrial, marine, and amorphous organic matter) of the Campanian-Selandian strata of the Gurpi Formation were studied to evaluate the changes in the Zagros paleobasin in southwestern Iran. Planktonic foraminifera were categorized into four morphotypes according to their paleodepth, extending from Morphotype 1, comprising surface gene...

Journal: : 2021

To reconstruct the climatic fluctuations that occurred in middle latitudes of Northern Hemisphere Atlantic Ocean Campanian Age, systematic composition shells planktonic foraminifera was studied from core samples seven deep-water drilling holes. The identified foraminiferal assemblages are assigned to two types (boreal and intermediate) one subtype (warm boreal) thanatocenosis. On basis their sp...

2006
SARAH J. FOWLER HARVEY E. BELKIN BENEDETTO DE VIVO

The Campanian Ignimbrite is a 4200 km trachyte^phonolite pyroclastic deposit that erupted at 39 3 0 1ka within the Campi Flegrei west of Naples, Italy. Here we test the hypothesis that Campanian Ignimbrite magma was derived by isobaric crystal fractionation of a parental basaltic trachyandesitic melt that reacted and came into local equilibrium with small amounts (5^10 wt%) of crustal rock (ska...

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