Results 171 to 180 of about 4,344 (221)

Oldest scleractinian fauna from Jamaica (Hauterivian, Benbow Inlier)

Journal of Paleontology, 2009
From the oldest Cretaceous marine sediments of Jamaica, the Copper Limestone within the Devils Racecourse Formation (Benbow Inlier, Clarendon Block), the oldest known coral fauna of the Caribbean is described. the small but diverse fauna encompasses 18 species in 17 genera of the suborders Amphiastraeina, Archeocaeniina, Heterocoeniina, Faviina ...
Hannes Löser, Thomas A. Stemann, Simon Mitchell   +2 more
openaire   +1 more source

ORBITAL CHRONOSTRATIGRAPHY OF THE VALANGINIAN–HAUTERIVIAN BOUNDARY: A CYCLOSTRATIGRAPHIC APPROACH

2004
Based on cyclostratigraphy and sequence stratigraphy criteria, an orbital chronostratigraphy is here proposed for the Upper Valanginian/Lower Hauterivian (Lower Cretaceous) stratigraphic interval. For such a purpose two biostratigraphically constrained carbonate platform sections have been measured and sampled at centimetre scale in southern Italy: (1)
Ferreri, V, Amodio, S, Sandulli, R, D'Argenio, B   +3 more
openaire   +4 more sources

An early cretaceous (Hauterivian) spore‐pollen assemblage from southern Chile

Palynology, 2009
Abstract A single sample from the Springhill Group of well 2 at La Posesion in the Manantiales oilfield, southern Chile at 1752 m yielded a rich spore-pollen assemblage. The sample is from the base of approximately 32 m of medium- to coarse-grained sandstone with streaks of brown-gray clay and occasional carbonaceous streaks.
L. M. CRANWELL, S. K. SRIVASTAVA
openaire   +1 more source

HAUTERIVIAN AND BARREMIAN IN THE FAR EAST

International Geology Review, 1964
Valanginian marine sediments are widespread in the eastern margin of Asia from China northward over the Sikhote-Alin region, as far west as the Amur river, and as far north as the Amgun river. This was an interior type sea with abundant islands and a boreal fauna.
openaire   +1 more source

Depositional conditions of the Bathonian to Hauterivian Janusfjellet Subgroup, Spitsbergen

Sedimentary Geology, 1991
Abstract The Janusfjellet Subgroup was formed under shallow marine shelf conditions dominated by sedimentation of clay, but silt and sand also accumulated in significant amounts. The sand bodies recognized in the Agardhfjellet Formation (Bathonian-B) are redeposition of sediments originating from earlier deltaic/coastal progradation. The Rurikfjellet
H. Dypvik, J. Nagy, T.A. Eikeland, K. Backer-Owe, H. Johansen   +4 more
openaire   +1 more source

New Valanginian–Hauterivian neocomitid ammonites from the Neuquén Basin, Argentina

Cretaceous Research, 2018
Abstract Three distinct, rich neocomitid faunas occur in the Agrio Formation (middle Valanginian to lowermost Barremian). In the ammonite sequences between, neocomitids are very rare and limited to two thin horizons. The lower, upper Valanginian level has yielded Neocomites (Varlheideites) cf.
Beatriz Aguirre-Urreta, Peter F. Rawson
openaire   +1 more source

Orbital control of the anoxic events in the Hauterivian andBarremian stages

2021
Episodes of Environmental Changes (EECs) correspond to reinforced greenhouseconditions associated to modifications of the carbon cycle that punctuated the EarlyCretaceous. From the latest Hauterivian to the Barremian, three EECs occurred (theFaraoni, Mid-Barremian and Taxy events).
Martinez, Mathieu, Aguado, Roque, Company, Miguel, Sandoval, Jose, O'Dogherty, Luis   +4 more
openaire   +2 more sources

Valanginian and Hauterivian marine ostracods from Patagonia (Argentina): Correlations and palaeogeography

Revue de Micropaléontologie, 2008
Abstract Some Early Cretaceous ostracod assemblages from the Neuquen Basin (West Central Argentina) share taxa with roughly coeval faunas previously reported from South Africa. Five assemblages are dealt with, from which two are proposed as formal biostratigraphic zones.
Eduardo A. Musacchio, Margarita Simeoni
openaire   +1 more source

Early Cretaceous (Valanginian – Hauterivian) belemnites from western Morocco: stratigraphy and palaeoecology

Cretaceous Research, 2008
Abstract Recent field work in Lower Cretaceous successions of the Agadir-Essaouira region, western High Atlas, Morocco, have resulted in 489 belemnite guards collected bed-by-bed from the lower Valanginian – upper Hauterivian interval.
Jörg Mutterlose, Kurt Wiedenroth
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Calcareous dinoflagellates from the Late Hauterivian (Early Cretaceous) of Frielingen, Germany

2013
A pale–dark bedded claystone–marlstone succession of Late Hauterivian age (Simbirskites discofalcatus ammonite Zone, Early Cretaceous), exposed in the clay-pit Frielingen, Germany (Lower Saxony Basin), was investigated with respect to its calcareous dinoflagellate cyst content.
Weinkauf, Manuel, Keupp, Helmut, Mutterlose, Jörg   +2 more
openaire   +2 more sources