Results 181 to 190 of about 12,654 (257)

Computed tomography reveals multiple origins of extreme caudal vertebral pneumaticity in sauropod dinosaurs

Journal of Anatomy, EarlyView.
Here, we present novel CT scan data of caudal vertebrae of six Middle–Late Jurassic sauropods, representing several eusauropod lineages. We synthesise these new data with a comprehensive critical appraisal of purported external and internal evidence for caudal vertebral PSP in Sauropodomorpha.
Samantha L. Beeston, Daniela Schwarz, Paul Upchurch, Stephen F. Poropat, Patrick Asbach, Philip D. Mannion   +5 more
wiley   +1 more source

The dynamics of rare earth elements in soil-plant systems in southern Brazil: a case study of carbonatite-bearing areas and Baccharis trimera. [PDF]

Environ Sci Pollut Res Int
Frescura LM, da Silva NW, Vieira DT, de Vargas Mallmann ML, Koester E, Lourega RV, da Rosa MB.   +6 more
europepmc   +1 more source

Differential Enrichment of Organic Matter in the Da'anzhai Member of the Sichuan Basin: A Response to the Toarcian Oceanic Anoxic Event. [PDF]

ACS Omega
Yang X, Yang F, Zhang S, Qiu R, Tang Y, Tang S.   +5 more
europepmc   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Evolution of biomolecular loadings along a major river system

, 2018
Peterse, Francien, Filip, Florin, Organic geochemistry & molecular biogeology, Liviu Giosan, Giosan, Liviu, Courcelle Stark, Freymond, Chantal V., Timothy I. Eglinton, Blattmann, Thomas M., Organic geochemistry, Kündig, Nicole, Stark, Courcelle, Buggle, Björn, Lupker, Maarten, Michael Plötze, Florin Filip, Chantal V. Freymond, Francien Peterse, Björn Buggle, Plötze, Michael, Nicole Kündig, Thomas M. Blattmann, Eglinton, Timothy I., Maarten Lupker   +23 more
core   +1 more source

Progressive sub-arc mantle oxidation modulated by sediment melt. [PDF]

Sci Adv
Gao M, Wang Y, Xu YG.
europepmc   +1 more source

Confirmation of the impact origin of the Late Ordovician Tvären impact structure (southeast Sweden) and emplacement of impactites in a marine setting

Meteoritics &Planetary Science, EarlyView.
Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska, Sanna Alwmark, Mikael Calner, Sylvain Richoz, Jens Ormö, Erik Sturkell, Carl Alwmark   +6 more
wiley   +1 more source

Revisiting the Hummeln structure, Sweden—A shallow marine Cambrian impact structure

Meteoritics &Planetary Science, EarlyView.
Abstract Hummeln is a simple impact structure located in south‐eastern Sweden. It is approximately 1.2 km in diameter and almost completely covered by a lake. Here, we present the first detailed investigation of impactites and mapping of the 164.25 m deep drill core Hummeln‐1 with a focus on impact metamorphism and the impact process.
S. Alwmark, J. Granbom, P. Ahlberg, M. Calner, S. Richoz, K. J. Gajewska, W. R. Hyde, K. Ljung, C. Alwmark   +8 more
wiley   +1 more source

Assessing the global flux of organic carbon transported from terrestrial surfaces to oceans by rivers. [PDF]

Carbon Balance Manag
Chen F, Bai X, Luo G, Zhang G, Ran C, Luo X.   +5 more
europepmc   +1 more source

Reassessing the organic carbon budget in the Murchison meteorite through an extraction–recovery mass‐balance approach

Meteoritics &Planetary Science, EarlyView.
Abstract A substantial fraction of organic carbon in carbonaceous chondrites has long been described as “missing,” reflecting incomplete recovery and limited resolution of operationally defined organic components. Here, we present a quantitative reassessment of the carbon budget in the Murchison meteorite using an integrated extraction–recovery mass ...
Hina Dohi, Minako Hashiguchi, Koichi Mimura   +2 more
wiley   +1 more source