Results 71 to 80 of about 105,245 (213)

Southward-Directed Subduction of the Farallon–Aluk Spreading Ridge and Its Impact on Subduction Mechanics and Andean Arc Magmatism: Insights From Geochemical and Seismic Tomographic Data

open access: yesFrontiers in Earth Science, 2020
Since the initial proposal of the past existence of a southward-directed mid-ocean ridge–subduction interaction in the Andes during Late Cretaceous–Paleogene times, several studies have been devoted to uncover the tectonomagmatic evidence of this process.
Sofía B. Iannelli   +15 more
doaj   +1 more source

Late Cretaceous Aquatic Plant World in Patagonia, Argentina

open access: yesPLoS ONE, 2014
Dans cette contribution, nous décrivons les dernières communautés de plantes aquatiques du Crétacé de la Formation de La Colonia, en Patagonie, en Argentine, en fonction de leurs composantes taxonomiques et de leurs attributs paléoécologiques. La Formation de La Colonia est une unité géologique déposée lors d'un épisode transgressif maastrichtiano ...
N. Rubén Cúneo   +3 more
openaire   +5 more sources

Geochemical characteristics of natural gas in the hydrocarbon accumulation history, and its difference among gas reservoirs in the Upper Triassic formation of Sichuan Basin, China

open access: yesJournal of Natural Gas Geoscience, 2016
The analysis of hydrocarbon generation, trap formation, inclusion homogenization temperature, authigenic illite dating, and ESR dating were used to understand the history of hydrocarbon accumulation and its difference among gas reservoirs in the Upper ...
Peng Wang   +5 more
doaj   +1 more source

Novos restos de Notosuchus terrestris Woodward, 1896 (Crocodyliformes: Mesoeucrocodylia) do Cretáceo Superior de Neuquén, Patagônia, Argentina [PDF]

open access: yes, 2008
New materials of Notosuchus terrestris are here described. They were found on Bajo de la Carpa Formation outcrops, near the Universidad Nacional del Comahue, Neuquén City.
Calvo, Jorge, Fiorelli, Lucas Ernesto
core  

First palynologic record of the Cretaceous La Yesera Formation (Salta Group), northwestern Argentina [PDF]

open access: yes, 2014
Thirty-four taxa were documented from six palynologically productive samples of the La Yesera Formation (Brealito and Don Bartolo Members) in the Pucará locality (Salta Province, northwestern Argentina).
Narvaez, Paula Liliana   +2 more
core   +1 more source

Plant microfossil record of the terminal Cretaceous event in the western United States and Canada [PDF]

open access: yes
Plant microfossils, principally pollen grains and spores produced by land plants, provide an excellent record of the terminal Cretaceous event in nonmarine environments.
Fleming, R. F., Nichols, D. J.
core   +1 more source

Shark and ray teeth from the Hauterivian (Lower Cretaceous) of north-east England [PDF]

open access: yes, 1999
Sampling of hiatal horizons within the Hauterivian part of the Speeton Clay Formation of north-east England has produced teeth of several species of sharks and rays, four of which are previously unnamed.
Mitchell, S.F.   +2 more
core   +1 more source

Late Cretaceous paleogeodynamics of Bulgaria

open access: yesGeologica Balcanica, 1993
The Tethyan system consisted in the Late Cretaceous of four plates, and namely Eurasia, the Oceanic Neotethys, Apulia (+ Menderes) and Africa (+Arabia). The Balkan microcontinent was situated between the Neotethys (Vardar ocean) and the Dobrogea cimmerian orogen. It was an integral whole (Albian-Turonian), or was fragmented through extension (Coniacian
openaire   +1 more source

The effects of the spreading of the Central Atlantic during the Middle Jurassic on dinosaur faunas [PDF]

open access: yes, 2012
The spreading of the Central Atlantic is a complex series of events that include a ridge jump to the east and a ridge jump to the west at c. 170Ma and c. 162Ma respectively.
Clark, N.D.L.
core  

A review of the fossil record of old world turtles of the clade pan-trionychidae [PDF]

open access: yes, 2017
Turtles of the clade Pan-Trionychidae have a rich fossil record in the Old World, ranging from the Early Cretaceous (Hauterivian) to the Holocene. The clade most probably originated in Asia during the Early Cretaceous but spread from there to the ...
Georgalis, Georgios L., Joyce, Walter G.
core   +1 more source

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