Results 101 to 110 of about 103,905 (335)

Zooglider-Based Measurements of Planktonic Foraminifera in the California Current System

Journal of Foraminiferal Research, 2019
Spines and rhizopodia play an important role in the feeding behavior, symbiont ecology, shell geochemistry, and density and drag of planktonic foraminifera.
D. Gaskell, M. Ohman, P. Hull
semanticscholar   +1 more source

Depositional Facies, Sequence Stratigraphy, and Diagenesis of Lower Cretaceous Carbonate Reservoir, Southern Iraq: Implications for Petroleum Exploration

Journal of Petroleum Geology, EarlyView.
ABSTRACT The Lower Cretaceous Yamama Formation of southern Iraq represents a key carbonate reservoir within Iraq and the Middle East, yet its complex depositional facies architecture and diagenetic alterations present challenges for predicting reservoir quality.
A. K. A. Mohammed, F. Velledits, I. Q. Mohammed, M. Alsuwaidi, H. Mansurbeg, F. Kristály, D. K. Ivanova, Eloi González‐Esvertit, A. Awdal   +8 more
wiley   +1 more source

Mn Incorporation in Large Benthic Foraminifera: Differences Between Species and the Impact of pCO2

Frontiers in Earth Science, 2020
Element concentrations of calcite precipitated by foraminifera reflect chemical and physical properties of seawater and can therefore be used to reconstruct (paleo-)environmental conditions.
Inge van Dijk, Inge van Dijk, Lennart J. de Nooijer, Christine Barras, Gert-Jan Reichart, Gert-Jan Reichart   +5 more
doaj   +1 more source

Testing the Influence of Changing Seawater Ca Concentration on Elements/Ca Ratios in Planktic Foraminifera: A Culture Experiment

Geochemistry, Geophysics, Geosystems, 2021
Element/Ca ratios in foraminifera shells are used to assess oceanic physical‐chemical properties (e.g., paleo‐temperature, paleo‐pH…). On geological time scales, these proxies may also depend on changes in the chemical composition of seawater.
Sandrine Le Houedec, Jonathan Erez, Yair Rosenthal   +2 more
doaj   +1 more source

Sedimentation processes on the Antarctic continental margin at Kapp Norvegia during the Late Pleistocene [PDF]

, 1986
Sedimentological analyses concerning ice rafted debris, grain size distribution, biogeneous components, and clay mineral composition of four sediment cores from the Antarctic continental margin off Kapp Norvegia reveal a cyclical pattern of three ...
Grobe, Hannes
core   +1 more source

Modeling seasonal and vertical habitats of planktonic foraminifera on a global scale

Biogeosciences, 2017
. Species of planktonic foraminifera exhibit specific seasonal production patterns and different preferred vertical habitats. The seasonal and vertical habitats are not constant throughout the range of the species and changes therein must be considered ...
K. Kretschmer, L. Jonkers, M. Kučera, M. Schulz   +3 more
semanticscholar   +1 more source

Geochemical and Seismic Constraints on the Role of Mud Diapirs in Petroleum Migration and Accumulation in the Recôncavo Basin, NE Brazil

Journal of Petroleum Geology, EarlyView.
ABSTRACT In the Recôncavo Basin, Northeast of Brazil, mud diapirs have been reported for decades, but their role within the basin's petroleum system remains poorly constrained. Here, we combine 2D seismic interpretation, field observations, and organic geochemical analyses of rocks and oil seeps to investigate the relationship between diapirism and ...
Cora Mattos, Egberto Pereira, Lucas Pinto Heckert Bastos, René Rodrigues   +3 more
wiley   +1 more source

Environmental DNA sheds new insight on molecular adaptation of foraminifera to temperature from laboratory‐controlled culture experiment

Ecology and Evolution
Foraminifera is the most important temperature proxy of the ocean on long time scales. However, the absence of temperature‐controlled experiments at different water depths hinders the advancement of paleotemperature reconstruction with foraminifera from ...
Haotian Li, Yanli Lei, Wenlong Fa, Tianzhen Wu, Tiegang Li   +4 more
doaj   +1 more source

Bio‐mediated cementation of supratidal beach sediments associated with groundwater springs

Sedimentology, EarlyView.
ABSTRACT The formation of beachrock, sensu stricto, via carbonate precipitation in the intertidal zone is widespread throughout the tropics and subtropics. While cementation of supratidal beach sediments has also been noted in several locations, it has received much less attention.
Thomas William Garner, J. Andrew G. Cooper   +1 more
wiley   +1 more source

Boron isotopes in foraminifera : systematics, biomineralisation, and CO2 reconstruction

, 2018
The boron isotope composition of foraminifera provides a powerful tracer for CO2 change over geological time. This proxy is based on the equilibrium of boron and its isotopes in seawater, which is a function of pH.
J. Rae
semanticscholar   +1 more source