Results 51 to 60 of about 23,562 (261)

Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

Geological Journal, EarlyView.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito, Cristiano Leite Sombra, Davy Raeder Brandão, Cleverson Guizan Silva, Sidney Luiz de Matos Mello, Eugênio Vaz dos Santos Neto, Rui Jorge Fernandes Baptista, Ramsés Capilla, Luiz Antônio Pierantoni Gambôa   +8 more
wiley   +1 more source

Study of planktonic morphotype of the Abderaz Formation at type section, Iran [PDF]

, 2009
Abderaz Formation at its type section with an age of Turonian-Early Campanian and a thickness of 300 m contains light grey shale and marl. The study of the planktonic foraminifera in isolated form led to differentiate three morphotype groups.
Meysam Shafiee Ardestani
core   +2 more sources

“Flames Over Persepolis”: New Scientific Evidence Supporting Historical Perspectives

Archaeometry, EarlyView.
ABSTRACT This study investigates the burning of Persepolis Terrace, historically attributed to Alexander III in 330 bce. A review of classical accounts and excavation reports, combined with diagnostic surveys, confirms the fire's historicity and provides novel insights.
Maria Letizia Amadori, Ileana De Giuseppe, Fabrizio Frontalini, Luca Pellegrino, Richard W. Jordan, Pierfrancesco Callieri, Emad Matin, Alireza Askari Chaverdi, Hamid Fadaei, Valeria Mengacci, Fulvio Fantino   +10 more
wiley   +1 more source

Distribution of planktonic foraminifera in the subtropical South Atlantic: depth hierarchy of controlling factors [PDF]

Biogeosciences, 2020
Temperature appears to be the best predictor of species composition of planktonic foraminifera communities, making it possible to use their fossil assemblages to reconstruct sea surface temperature (SST) variation in the past.
D. Lessa, D. Lessa, R. Morard, L. Jonkers, I. M. Venancio, R. Reuter, A. Baumeister, A. L. Albuquerque, M. Kucera   +8 more
doaj   +1 more source

Change in the North Atlantic circulation associated with the mid-Pleistocene transition [PDF]

, 2018
The southwestern Iberian margin is highly sensitive to changes in the distribution of North Atlantic currents and to the position of oceanic fronts. In this work, the evolution of oceanographic parameters from 812 to 530 ka (MIS20-MIS14) is studied based
F. Abrantes, F. Abrantes, F. J. Sierro, G. M. Martin-Garcia, J. A. Flores   +4 more
core   +2 more sources

Combining morphological and molecular data to study past foraminiferal communities from a temperate coastal sediment core

Boreas, EarlyView.
This paper presents the results of a dual approach for assessing fossil benthic foraminiferal communities using both traditional morphology‐based analyses and sedimentary ancient DNA (sedaDNA) metabarcoding. The main objectives are to test the feasibility of sedaDNA analyses to assess foraminiferal biodiversity in temperate shelf sediments (Le Croisic,
Meryem Mojtahid, Magali Schweizer, Damien Le Moigne, Gwendoline Grégoire, Anne  Murat, Isabelle Poirier, Agnès Baltzer, Inge van Dijk, Marie‐Christine Morère‐Le Paven, Martin Bourges, Maria Pia Nardelli, Christine Barras, Edouard Metzger, Aurelia Mouret   +13 more
wiley   +1 more source

Facies and paleoenvironmental reconstruction of Early–Middle Miocene deposits in the north-west of the Zagros Basin, Iran

Geologica Carpathica, 2019
Facies analysis and paleoenvironmental reconstruction of the Burdigalian to Langhian Asmari Formation, outcropping in the Khorram Abad Anticline, in the north-west of the Zagros Basin allow us to interpret the carbonate ramp history during the Early ...
Roozpeykar Asghar, Maghfouri-Moghaddam Iraj, Yazdi Mehdi, Yousefi-Yegane Bizhan   +3 more
doaj   +1 more source

Projected impacts of climate change and ocean acidification on the global biogeography of planktonic Foraminifera [PDF]

Biogeosciences, 2015
Planktonic Foraminifera are a major contributor to the deep carbonate flux and their microfossil deposits form one of the richest databases for reconstructing paleoenvironments, particularly through changes in their taxonomic and shell composition. Using
T. Roy, F. Lombard, L. Bopp, M. Gehlen
doaj   +1 more source

Palaeobathymetry of the Abderaz Formation using foraminifera, Iran [PDF]

, 2009
Abderaz Formation at its type section with an age of Turonian-early Campanian and a thickness of 300 m contains light grey shale and marl. The study of the planktonic foraminifera in isolated form led to differentiate three morphotype groups.
Ebrahim Ghasemi-Nejad, Meysam Shafiee Ardestani   +1 more
core   +1 more source

Northern Hemisphere Glaciation during the Globally Warm Early Late Pliocene [PDF]

, 2013
The early Late Pliocene (3.6 to ~3.0 million years ago) is the last extended interval in Earth's history when atmospheric CO2 concentrations were comparable to today's and global climate was warmer.
DeSchepper, Stijn, Groeneveld, J, Head, M, Hennissen, Jan, Karl, Fabian, Louwye, Stephen, Naafs, B D A, Renterghem, Cédéric   +7 more
core   +6 more sources