Results 151 to 160 of about 32,377 (248)

Uranium Isotope Evidence for Persistent Global Ocean Anoxia Across the Ediacaran–Cambrian Transition in Siberia

Geobiology, Volume 24, Issue 5, September/October 2026.
ABSTRACT The enigmatic Ediacara biota represents Earth's earliest example of macroscopic, complex life, yet the driving forces promoting their mid‐Ediacaran evolution and subsequent extinction across the Ediacaran–Cambrian boundary remain speculative. If these were true animals requiring oxygen for aerobic respiration, their rise has often been linked ...
Andrew D. Doerrler, Tian Gan, Geoffrey J. Gilleaudeau, Matthew G. Pedersen, Natalia Bykova, Vasiliy Marusin, Natalia A. Ivanova, Boris Kochnev, Dimitriy V. Grazhdankin, Karel Kletetschka, Alan J. Kaufman   +10 more
wiley   +1 more source

<i>Ganiopteris</i> gen. nov., an early Carboniferous seed plant with foliar-borne ovules and its evolutionary significance. [PDF]

Natl Sci Rev
Wang DM, Zhou Y, Yang JN, Xu P, Liu L, Qin M, Pan YH.   +6 more
europepmc   +1 more source

Resolving Micrometre‐Scale Zircon Growth in Silicic Systems by 7 μm LA‐MC‐ICP‐MS U‐Pb Dating: Linking Petrology and Geochronology in Silicic Volcanic and Granitic Rocks from Victoria, Australia

Geostandards and Geoanalytical Research, Volume 50, Issue 3, Page 625-647, September 2026.
Key Points 7 μm spot‐diameter LA‐MC‐ICP‐MS analyses yield accurate zircon U‐Pb ages. 1013 Ω amplifier resistors improve low‐signal Pb measurements. Saturn correction protocols minimise down‐hole fractionation effects. We present a systematic evaluation of high spatial‐resolution zircon U‐Pb dating using a Thermo Scientific Neoma multi‐collector ICP‐MS ...
Cristiano Lana, John D. Clemens
wiley   +1 more source

Characterizing and distinguishing the earliest woody euphyllophytes based on secondary xylem anatomy: method development and application. [PDF]

Ann Bot
Casselman E, Tomescu AMF.
europepmc   +1 more source

(Ultra)high‐Pressure Metamorphism in Sedimentary Versus Basaltic Rocks: Insights From a Variscan Mélange in the South Carpathians

Journal of Metamorphic Geology, Volume 44, Issue 8, Page 585-610, September 2026.
ABSTRACT Reconstructing the pressure–temperature–time (P–T–t) evolution of (ultra)high‐pressure rocks is essential for constraining subduction and collisional dynamics. Subduction zones are often investigated using basic eclogites, whereas nonbasic high‐pressure rocks remain comparatively understudied, potentially hindering a comprehensive ...
Otavio S. G. Silva, Bruno V. Ribeiro, Gavril Săbău, Fabricio Caxito, Paulo A. de Paiva‐Silva, Pierre Lanari, George Luvizotto, Mahyra Tedeschi   +7 more
wiley   +1 more source

An Upper Devonian foredeep basin in the Southern Central Iberian Zone (Variscan Iberian Massif): Consequences for Variscan plate dynamics

New field research and revision of previous works in the Variscan Iberian Massif unravel the existence of an Upper Devonian foredeep basin in the southern Central Iberian Zone, close to the suture area with the Ossa-Morena Zone.
Martín Parra, Luis Miguel, Díez Fernández, Rubén, González Menéndez, L., Matas, Jerónimo, Rubio Pascual, Francisco J., Rodríguez Fernández, Luis Roberto, Moreno Martín, Diana   +6 more
core   +1 more source

U-Pb Detrital Zircon Geochronology and Its Tectonic Implications for the Middle Devonian at the Northwestern Margin of the Yangtze Block. [PDF]

ACS Omega
Guo T, Yang WF, Zeng L, Wang C.
europepmc   +1 more source

A revised interpretation of the oral anatomy of Athenaegis chattertoni Soehn & Wilson (Vertebrata, Heterostraci) from the Silurian of Northwest Territories, Canada

Palaeontology, Volume 69, Issue 5, September/October 2026.
Abstract Heterostracans are pivotal in examining the evolution of feeding and the head in jawed vertebrates as the stem‐gnathostomes in which the oral apparatus is more commonly preserved. However, most analyses of their feeding, especially recent studies using modern 3D imaging methods, have focused on a specific subgroup, the Pteraspidiformes ...
Lisa Schnetz, Agnese Lanzetti, Andy S. Jones, Richard P. Dearden, Kathleen Dollman, Vincent Fernandez, Stephan Lautenschlager, Zerina Johanson, Sam Giles, Ivan J. Sansom   +9 more
wiley   +1 more source

Multilamellated zones in the sporoderm of heterosporous lycopsids: adaptive trait or evolutionary spandrel? [PDF]

Ann Bot
Zavialova N, Polevova S.
europepmc   +1 more source

Structural and functional characterisation of a reconstructed ancestral strigolactone receptor

The Plant Journal, Volume 127, Issue 5, September 2026.
Significance Statement Ancestral sequence reconstruction of the strigolactone receptor DWARF14 (D14) reveals that its substrate specificity and signalling mechanism have remained largely conserved in seed plants. Ancestral D14 exhibits improved recombinant yields, thermostability and catalytic activity relative to D14 from Arabidopsis thaliana ...
Andrew J. Tuckey, Andrew C. Marshall, Emel Rothzerg, Antonella P. Monte, Tom Bennett, Charles S. Bond, Mark T. Waters   +6 more
wiley   +1 more source