Results 261 to 270 of about 183,367 (338)

Maureen Steiner, Pioneer in the Study of the Magnetic Polarity Timescale

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract This perspective is in memory of Maureen Steiner (1944–2023), who was a pioneer in the study of geomagnetism and paleomagnetism. Over an approximately 50‐year‐long career, she made many contributions to the study of geomagnetic history and its application to diverse geological problems.
Spencer G. Lucas
wiley   +1 more source

John W. Geissman: Never Let the You‐Know‐Who's Get You Down—There Is Too Much in Life to Experience and Learn From!

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract My life in science, as a faculty member in Higher Education (The Academy), and as a proud member of AGU, reflects the fact that I am one of the very fortunate ones in the Geosciences who went through undergraduate and graduate years during the true blossoming of the science in the early years after the acceptance of Plate Tectonics.
John W. Geissman
wiley   +1 more source

A pedo‐isotopic approach to study sandy soils of the Brazilian Cerrado in Piauí State

Agrosystems, Geosciences &Environment, Volume 8, Issue 3, September 2025.
Abstract Sandy soils dominate Brazil's Cerrado biome in Piauí State, yet their organic carbon (OC) stabilization mechanisms and landscape‐driven pedogenesis remain poorly understood. To clarify this topic, the present study proposes a pedo‐isotopic approach to characterize six representative Brazilian Cerrado soils derived from sedimentary rocks in ...
Ronny Sobreira Barbosa, Ozeas S. Costa Jr., Vanessa Martins, Yuri Jacques Agra Bezerra da Silva, Ygor Jacques Agra Bezerra da Silva, Paulo Henrique Dalto, Poliana Rocha D'Almeida Mota, Vinicius Vasconcelos, Gabriela Bielefeld Nardoto   +8 more
wiley   +1 more source

An Improved Chemical Extraction Procedure for the Sr Isotope Analysis of Liquid Agrifood Samples Applied to Authenticating the Origin of Maple Syrups in Quebec (Canada)

Rapid Communications in Mass Spectrometry, Volume 39, Issue 16, 30 August 2025.
ABSTRACT Rationale We describe a new simplified sample preparation technique, based on dual chromatography for the analysis of 87Sr/86Sr in liquid agri‐food samples. We applied this approach for authenticating the origin of maple syrup products in Quebec, characterizing the 87Sr/86Sr of soil profiles from geologically distinct maple groves, including ...
B. Saar de Almeida, R. Stevenson, M. Sadiki, L. Lagacé, D. Widory   +4 more
wiley   +1 more source

Reassessment of Xenodens calminechari with a discussion of tooth morphology in mosasaurs

The Anatomical Record, Volume 308, Issue 8, Page 2160-2172, August 2025.
Abstract Xenodens calminechari is a mosasaurid taxon named by Longrich et al. (2021) based on the holotype MHNM.KH.331, a left maxilla with several teeth. This holotype was obtained nonscientifically (without technical supervision) from an area in Morocco that yields many manipulated or forged specimens. Examination of Longrich et al.
Henry S. Sharpe, Mark J. Powers, Michael W. Caldwell   +2 more
wiley   +1 more source

Was the Dry Diagonal of South America a Barrier for Dispersing Pteridaceae (Polypodiopsida) Species Between the Brazilian Atlantic Forest and Amazon Forest?

Journal of Biogeography, Volume 52, Issue 8, August 2025.
ABSTRACT Aim We sought to assess how phylogenetic patterns within the fern family Pteridaceae are related to the history of the Amazon Forest and the Brazilian Atlantic Forest, as well as the Dry Diagonal of South America. The age of taxa present in these regions was estimated, as well as those found in previously identified areas of endemism for the ...
Aline Possamai Della, Eric Schuettpelz, Kathryn Picard, Jefferson Prado   +3 more
wiley   +1 more source

A new notosuchian crocodyliform from the Early Palaeocene of Patagonia and the survival of a large-bodied terrestrial lineage across the K-Pg mass extinction. [PDF]

Proc Biol Sci
Bravo GG, Pol D, Leardi JM, Krause JM, Nicholl CSC, Rougier G, Mannion PD.   +6 more
europepmc   +1 more source

Pollen morphology, deep learning, phylogenetics, and the evolution of environmental adaptations in Podocarpus

New Phytologist, Volume 247, Issue 3, Page 1460-1473, August 2025.
Summary Podocarpus pollen morphology is shaped by both phylogenetic history and the environment. We analyzed the relationship between pollen traits quantified using deep learning and environmental factors within a comparative phylogenetic framework.
Marc‐Élie Adaimé, Michael A. Urban, Shu Kong, Carlos Jaramillo, Surangi W. Punyasena   +4 more
wiley   +1 more source

Redox state of subducted sediments controls porphyry copper mineralization along the Tethyan belt. [PDF]

Nat Commun
Li H, Yang Z, Lu Y, Hou Z.
europepmc   +1 more source

Schist Belts of the Benin‐Nigeria Shield Reveal a Neoproterozoic History

Terra Nova, Volume 37, Issue 4, Page 239-249, August 2025.
ABSTRACT Belts of metasedimentary rocks (schist belts) in the Benin‐Nigeria Shield (BNS) are investigated for the first time using U–Pb dating and Lu‐Hf isotope analysis of detrital zircons. We report maximum depositional ages that place their deposition firmly in the Neoproterozoic and link them with strata in the Dahomey Belt, the central African ...
Axel Hofmann, Silas Dada, Samuel B. Olobaniyi, Isaac Ajigo, Marlina Elburg, Fabricio A. Caxito, Andrey Bekker   +6 more
wiley   +1 more source