Results 21 to 30 of about 7,540 (244)

Petrophysics and sediment variability in a mixed alluvial to lacustrine carbonate system (Miocene, Madrid Basin, Central Spain)

The Depositional Record, 2022
This study evaluates variations in petrophysical properties within a mixed alluvial to lacustrine carbonate system (Miocene, Madrid Basin, Central Spain).
John J. G. Reijmer, Carlette N. Blok, Ammar El‐Husseiny, Lucas M. Kleipool, Yanto C. K. Hogendorp, Ana María Alonso‐Zarza   +5 more
doaj   +1 more source

Research on shale dynamic and static elastic modulus and anisotropy based on pressurization history

Frontiers in Earth Science
The dynamic and static elastic parameters of rocks exhibit differences. It is of great practical significance to carry out experiments on dynamic and static elastic parameters of rocks under reservoir conditions and determine the conversion relationship ...
Di Zhang, Di Zhang, YaFeng Li, YaFeng Li, YaNan Guo, YaNan Guo, HanLin Xia, HanLin Xia, YanXin Liu, YanXin Liu, JiaShen Yan, JiaShen Yan, Fei Wang, YinTing Wu   +13 more
doaj   +1 more source

Climate variations in the Circum-Alpine region and their influence on Neolithic-Bronze Age lacustrine communities displacement and\or cultural adaptation

Documenta Praehistorica, 2009
Because of its delicate balance, the hydrological system of the Alpine region is affected immediately by climatic variations. The most obvious evidence of hydrologic instability is reflected by natural water basins in particular rivers and lakes.
Francesco Menotti
doaj   +1 more source

Dolomitization and Silicification in Syn-Rift Lacustrine Carbonates: Evidence from the Late Oligocene–Early Miocene Duwi Basin, Red Sea, Egypt

Geosciences
Studies of early syn-rift successions in the Duwi Basin have revealed repetitive lacustrine carbonate deposits exhibiting regressive sequences and early diagenetic processes.
Tawfiq Mahran, Reham Y. Abu Elwafa, Alaa Ahmed, Osman Abdelghany, Khaled M. Abdelfadil   +4 more
doaj   +1 more source

Early Pliocene Varanus (Squamata, Varanidae) remains from Megalo Emvolon, Thessaloniki, Greece

The Anatomical Record, EarlyView.
The article describes new cranial and postcranial varanid material from Megalo Emvolon Lower Pliocene vertebrate fossil site near Thessaloniki. The fossils, likely representing a single individual, are referred to Varanus cf. marathonensis. Abstract This study describes new fossil varanid material from a recently discovered fossil spot (MVL site) at ...
Chara Drakopoulou, Georgios L. Georgalis, Georgios Lazaridis, Dimitris S. Kostopoulos   +3 more
wiley   +1 more source

Growth morphologies and plausible stressors ruling the formation of Late Pleistocene lacustrine carbonate buildups in the Maquinchao Basin (Argentina)

The Depositional Record, 2019
In a seminal paper regarding the mechanisms of carbonate stromatolite formation, Ginsburg (1991, Controversies in Modern Geology, pp. 25–36) emphasized the need to question the relative role of microbes versus environment in their formation.
Inès Eymard, Andrés Bilmes, María del Pilar Alvarez, Rodrigo Feo, Gabriel Hunger, Crisogono Vasconcelos, Daniel Arizteguí   +6 more
doaj   +1 more source

Structure and Mechanical Properties of the Dueñas Clay Formation (Tertiary Duero Basin, Spain): An Overconsolidated Clay of Lacustrine Origin

Applied Sciences, 2021
The Dueñas Clay Formation is considered an example of a deposit of lacustrine continental origin. It is formed mainly by overconsolidated clays and includes feldspathic arenites, and clayey and silty levels; however, in geotechnical projects it is ...
José Nespereira, José Antonio Blanco, Mercedes Suárez, Emilia García-Romero, Mariano Yenes, Serafín Monterrubio   +5 more
doaj   +1 more source

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

The 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, Matheus P. S. Rocha, Francisco P. Lima‐Filho, Aline M. Ghilardi   +3 more
wiley   +1 more source

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

The Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro, Marco Aurélio Gallo de França   +1 more
wiley   +1 more source

Pore Fractal Characteristics of Lacustrine Shale of Upper Cretaceous Nenjiang Formation from the Songliao Basin, NE China

Applied Sciences, 2023
The evaluation of pore characteristics in lacustrine shales is of significance for shale oil and gas exploration in terrestrial sedimentary basins. However, due to the complex depositional environments, there have been few reports on the quantitative ...
Tian Dong, Lei Kang, Yifan Zhang, Yuan Gao   +3 more
doaj   +1 more source