Results 131 to 140 of about 47,665 (281)

Reconstructing Cenozoic grasslands in North America and western Eurasia: evidence for cold‐season grasses from 3D phytolith morphology

New Phytologist, EarlyView.
Pie charts illustrate the composition of fossil grass silica short‐cell phytolith (GSSCP) assemblages at investigated fossil sites in the United States and Türkiye and representative 3D meshes of classified phytoliths. Summary Pooideae, the largest grass subfamily, radiated in the Northern Hemisphere from the Paleocene onward and today dominates cold ...
Rosalie M. Hermans, Timothy J. Gallaher, William H. Brightly, Callie Zender, Christophe Snoeck, Caroline A. E. Strömberg   +5 more
wiley   +1 more source

Cenozoic plate driving forces [PDF]

, 1995
Past studies of plate driving forces have concluded that the forces due to subducted slabs in the upper mantle and those due to the thickening of the oceanic lithosphere are the principal driving forces. We reexamine the balance of driving forces for the
Richards, MA, Lithgow‐Bertelloni, C
core  

Coupled plagioclase dissolution and K‐feldspar overgrowth precipitation preserve anomalously high permeability in deeply buried sandstones

Sedimentology, EarlyView.
ABSTRACT This study investigated the formation mechanism responsible for anomalously high permeability (AHP) observed in the Eocene sandstones at depths from 3824 to 3832 m in the Huizhou Sag, Pearl River Mouth Basin, China, using helium porosity and permeability measurements, thin section, scanning electron microscopy, electron probe X‐ray ...
Changgui Xu, Huan Li, Wei Wang, Yangdong Gao, Guangrong Peng, Lin Ding, Eric O. Ansah, Pei Liu, Xiaoyan Li, Saju Menacherry, Hongtao Zhu, Xianghua Yang, Zhiwei Zeng   +12 more
wiley   +1 more source

Drowned carbonate‐rimmed margin controlling shelf‐edge delta progradation and sedimentation dynamics: Upper Cretaceous Woodbine Formation, Texas, USA

Sedimentology, EarlyView.
ABSTRACT Shelf‐edge deltas are commonly interpreted to record basinward facies migration across uninterrupted, gently dipping shelf margins; however, examples from mixed siliciclastic‐carbonate margins reveal more complex depositional dynamics. Periods and areas of carbonate sedimentation within mixed siliciclastic‐carbonate margins can modify shelf ...
Abdulkarim Al‐Hussaini, Cornel Olariu, Charles Kerans, Ronald Steel   +3 more
wiley   +1 more source

(Table 1) Stable carbon and oxygen ratios and mineralogy of Cenozoic cements recovered during ODP Leg 112

, 1990
(Table 1) Stable carbon and oxygen ratios and mineralogy of Cenozoic cements recovered during ODP Leg ...
Suess, Erwin, Thornburg, Todd M, Todd M Thornburg (6981437), Erwin Suess (6961439)   +3 more
core   +1 more source

Siliceous sponges or seawater as a silicon source? Tracing silicon burial pathways of the Upper Cretaceous opal‐CT deposits using δ30Si and δ7Li

Sedimentology, EarlyView.
ABSTRACT Classical models of formation of sedimentary siliceous rocks (flint, chert, opoka) commonly assume that the Cretaceous marine silicon (Si) cycle was primarily biologically controlled, broadly analogous to the modern ocean. In this framework, siliceous sponges are regarded as the principal source of dissolved silica (dSi) to sediment porewaters,
Agata Jurkowska, Ewa Świerczewska‐Gładysz, Marek Szczerba, Tomáš Magna, Szymon Kowalik Filipowicz   +4 more
wiley   +1 more source

Salt Range Formation of Pakistan Preserves Unique Record of Volcanic Fertilization During the Ediacaran Shuram Excursion

Terra Nova, EarlyView.
ABSTRACT Thin, discontinuous, organic‐rich oil shale beds in the siliciclastic‐evaporitic Salt Range Formation (SRF) of Pakistan are of approximate Neoproterozoic to Cambrian age based on stratigraphic constraints. The beds are enriched (26–43 wt.% total organic carbon, TOC) in aliphatic organic matter (OM) of low thermal maturity despite their ...
Paul C. Hackley, Ryan J. McAleer, Jay M. Thompson, Brett J. Valentine, Imran Khan   +4 more
wiley   +1 more source

The outward growth of the arcuate tectonic belt in the northeastern Tibetan Plateau: Insights from three-dimensional finite element numerical simulations

Dizhi lixue xuebao
Objective  The arcuate tectonic belt in the northeastern Tibetan Plateau is a unique boundary for the lateral growth of the Tibetan Plateau. Characterized by an arcuate geomorphology with alternating basins and mountains perpendicular to the direction of
ZHAO Yilin, SUN Yujun, HOU Guiting, SHI Wei   +3 more
doaj   +1 more source

Tectonic Forcing of Diachronous Salt Deposition During the Badenian Salinity Crisis Revealed by U–Pb Dating of Tephra Overlying Tuzla Basin Evaporites

Terra Nova, EarlyView.
ABSTRACT During the Middle Miocene Badenian Salinity Crisis (BSC), extensive evaporites formed across different tectonic settings in the Central Paratethys. Limited age constraints hamper evaporite correlation and identification of driving mechanisms. Here, we use U–Pb dating of zircon by LA‐ICP‐MS from tephra overlying the Tuzla Basin evaporites.
Nevena Andrić‐Tomašević, Oleg Mandic, Wout Krijgsman, Armin Zeh, Stjepan Ćorić, Sejfudin Vrabac   +5 more
wiley   +1 more source

Differentiation and Population Structure of Idyla bicristata (Gastropoda: Clausiliidae) on Euboea, Greece

Zoologica Scripta, EarlyView.
ABSTRACT Idyla bicristata is a highly variable rock‐dwelling door snail species living on limestone rocks around the Aegean Sea. The island of Euboea and the adjacent Greek mainland are a hotspot for morphological variability in I. bicristata, resulting in the various forms being named. A population genetic analysis of 23 populations of I.
Elisa Becher, Viktoriia Lebedynska, Jie Xu, Bernhard Hausdorf   +3 more
wiley   +1 more source