Results 31 to 40 of about 7,350 (205)

Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil)

open access: yesThe Anatomical Record, EarlyView.
Abstract Pterosaur dental biology remains poorly understood despite its importance for comprehending feeding strategies and flight adaptations. Here, we present the first comprehensive histological analysis of an ornithocheiriform pterosaur tooth from the Lower Cretaceous Crato Formation (Santana Group, Northeast Brazil).
Tito Aureliano   +3 more
wiley   +1 more source

Mineralogía de los materiales de la Formación de La Viñuela (Cordilleras Béticas)

open access: yesEstudios Geologicos, 1984
Se ha estudiado la composición mineralógica de unas muestras de la serie tipo de la Formación de La Viñuela (norte de Vélez Málaga, Cordilleras Béticas), datadas como Burdigaliense inferior.
E. Galán   +3 more
doaj   +1 more source

Paleodieta : un acercamiento al estudio de la alimentación en las poblaciones del pasado [PDF]

open access: yes, 2012
Mitjançant l'anàlisi química d'elements traça en restes òssies humans, la Química contribueix al coneixement de les poblacions passades, col·laborant amb l'Arqueologia i complementant l'estudi antropològic i paleopatològic, ajudant-nos així a un millor ...
Cervera Añón, Juan Miguel
core   +1 more source

Hotspots, trends, and regional focus on oil or gas exploration: A bibliometric comparative study

open access: yesDeep Underground Science and Engineering, EarlyView.
This paper explores the research trends in global oil and gas exploration through the bibliometric analysis of 3460 articles collected from the Web of Science database on oil and gas exploration published from 2013 to 2023. The research hotspots, objects, regional distribution, methods, and evaluation methods of oil and gas exploration are analyzed and
Jihong Wang   +3 more
wiley   +1 more source

Génesis de Nódulos de Cuarzo en el Paleozoico de la Ibérica (Rama Aragonesa)

open access: yesEstudios Geologicos, 1987
En formaciones samíticas y pelíticas del Paleozoico inferior de la Rama Aragonesa de la Cordillera Ibérica se generan nódulos de sílice que son apreciables a escala microscópica y mesoscópica.
A. Navas, J. Tena
doaj   +1 more source

A perspective review of applications of the computed tomography (CT) scan imaging technique for microscopic reservoir rock characterization

open access: yesDeep Underground Science and Engineering, EarlyView.
In this review, the application of micro‐CT and medical‐CT scanning in the oil and gas industry has been thoroughly discussed. Recent improvements in DRP and modern imaging techniques in the oil and gas industry have been modeled using both experimental and simulation work.
Achinta Bera   +2 more
wiley   +1 more source

Mineralogía y génesis de las arcillas de las unidades del Campo de Gibraltar. I. Areniscas del Aljibe

open access: yesEstudios Geologicos, 1988
Las «areniscas del Aljibe» son materiales bimodales constituidos en su mayor parte por cuarzos eólicos con «coating» ferruginoso o arcilloso y cemento de cuarzo sintaxial. Tanto la composición mineralógica de la muestra total como la de la fracción < 2 μ
P. Rodríguez Jiménez, M. D. Ruiz Cruz
doaj   +1 more source

Diagenesis of tight sandstone and its influence on reservoir properties: A case study of Fuyu reservoirs in Songliao Basin, China

open access: yesUnconventional Resources, 2023
Diagenesis is the primary cause of the densification of the Fuyu reservoir in Sanzhao sag, Songliao Basin. In this paper, the types of diagenesis, the influence of diagenesis on reservoir physical properties and the formation reasons of tight reservoir ...
Shanghua Si   +5 more
doaj   +1 more source

Estudio petrológico de las facies Saxoniense y Buntsandstein de la zona de El Pobo de Dueñas (Cordillera Ibérica) [PDF]

open access: yes, 1983
Las areniscas rojas de facies Saxoniense y Buntsandstein estudiadas son cuarzoarenitas y sublitoarenitas, que hacia el tramo medio del Buntsandstein se hacen progresivamente más ricas en feldespatos, llegando al techo de la serie a ser arcósicas ...
Marfil, Rafaela, Sentchordi, E.
core   +1 more source

A novel construction approach for the pore structure model principally focuses on the controllable roundness of rock particles

open access: yesDeep Underground Science and Engineering, EarlyView.
Particle rounding effects comparison of different methods: (a), (b), and (c) are the rounding results using the B‐spline curve method with different R; (d), (e), and (f) are the results of vertex rounding substitution method with different rounding radii.
Jiabin Dong   +6 more
wiley   +1 more source

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