Results 101 to 110 of about 40,515 (240)

Variability in Plio-Pleistocene climates, habitats, and ungulate biomass in southern Africa [PDF]

, 1997
Vrba, and deMenocal and Bloemendal have emphasised the importance of climatic change, particularly temperature, in the context of evolution on the African continent within the past 5 million years.
Reynolds, Sally C., Thackeray, J. F.
core  

Springtime Formation of Laminated Soil Carbonate Rinds and Changes in Fluvial Terrace Soils on Orbital Timescales at Rio Mesa, Utah, USA

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract Laminated soil carbonate rinds are a Quaternary paleoclimate archive whose isotope composition is linked to soil formation conditions. At Rio Mesa, Utah (USA), we investigated the fidelity of rind records in a river terrace setting by determining the seasonal timing of rind formation and testing for inter‐record replication.
Tyler E. Huth, Thure E. Cerling, David W. Marchetti, Amy L. Ellwein, Shannon Mahan, David R. Bowling, Benjamin H. Passey, Victor J. Polyak, Yemane Asmerom   +8 more
wiley   +1 more source

Geodynamic contributions to global climatic change [PDF]

Orbital and rotational variations perturb the latitudinal and seasonal pattern of incident solar radiation, producing major climatic change on time scales of 10(exp 4)-10(exp 6) years.
Bills, Bruce G.
core   +1 more source

Origin of Late Noachian‐Early Hesperian Valley Networks on Mars: Insights From Landform Evolution and Ice Sheet Modeling

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Dendritic valley networks on Mars have been cited as evidence for a warm and wet Noachian Mars, permitting rainfall precipitation and surface runoff. However, the climatic conditions required to sustain rainfall on early Mars remain debated.
K. R. Karpenko, J. L. Fastook, J. W. Head, A. D. Howard, C. I. Fassett, J. L. Dickson, K. E. Scanlon, B. D. Boatwright   +7 more
wiley   +1 more source

Gully erosion in India: Geo‐environmental controls and region‐specific characteristics

Geographical Research, Volume 64, Issue 2, May 2026.
Spatial statistical analyses using a novel spatial database of India‧s gully erosion landforms revealed that India has six major gullying‐affected regions, three of which (EU, DU, and KCH) are dominated by gully systems (gully networks), with badlands (vast intensely gullied landscapes) being predominant in the other three regions (YB, GP, and RU ...
Anindya Majhi, Martin Evans, Emma Shuttleworth, Angela Harris   +3 more
wiley   +1 more source

Periodic Orbits for a Discontinuous Vector Field Arising from a Conceptual Model of Glacial Cycles

, 2015
Conceptual climate models provide an approach to understanding climate processes through a mathematical analysis of an approximation to reality. Recently, these models have also provided interesting examples of nonsmooth dynamical systems.
Hahn, Jonathan, McGehee, Richard, Walsh, James, Widiasih, Esther   +3 more
core   +1 more source

Cenozoic Time Constraints on the Evolution of a Gleysol‐Ferralsol‐Podzol Toposequence, Northwest Amazon Basin, Brazil

European Journal of Soil Science, Volume 77, Issue 3, May–June 2026.
ABSTRACT Deciphering the time milestones of clay formation is crucial for modeling the evolution of major geological systems near the Earth's surface. In the present study, kaolinite samples collected along four vertical profiles within a Gleysol‐Ferralsol‐Podzol soil toposequence near São Gabriel da Cachoeira, NW Amazon Basin (Brazil) are dated using ...
Célia Regina Montes, Thierry Allard, Madeleine Sélo, Yves Lucas, Chloé Fourdrin, Öykü Ataytür, Débora Ayumi Ishida, Etienne Balan, Adolpho José Melfi   +8 more
wiley   +1 more source

Bromine Enrichment Signal in Svalbard Shallow Cores Reflects Changes of Seasonal Sea Ice Variability

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Bromine enrichment Brenr $\left(\mathrm{B}{\mathrm{r}}_{\mathrm{e}\mathrm{n}\mathrm{r}}\right)$ has been widely used as a proxy for past sea ice reconstructions. In this study, three firn cores drilled on Holtedahlfonna (Svalbard) were analyzed for trace elements. Excluding a single year data, a positive correlation was observed between Brenr $
Enrico Biscaro, Federico Scoto, Catherine Larose, Elena Barbaro, Francois Burgay, David Cappelletti, Giuliano Dreossi, Jacopo Gabrieli, Elisabeth Isaksson, Jack Kohler, Barbara Stenni, Clara Turetta, Jean‐Charles Gallet, Andrea Spolaor   +13 more
wiley   +1 more source

Size of the cave bear population and skeletal distribution from Urşilor Cave, Romania

Travaux de l'Institut de Speologie Emile Racovitza, 2016
Spatial distribution analyses of fossil bones are often used in cave taphonomy for i) assessing directly the size of a given fossil population and ii) indirectly, for palaeo-environmental reconstructions.
MARIUS ROBU, ALEXANDRU PETCULESCU, IONUŢ-CORNEL MIREA, MARIUS KENESZ, MARIUS VLAICU, CRISTIAN-MIHAI MUNTEANU, AUGUSTIN NAE, VALERICĂ TOMA   +7 more
doaj  

A >300 Myr Long‐Lived Topographic Highland Along the Northern North China Craton Margin Driven by Multistage Continental Convergence

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Topographic highlands commonly develop along convergent plate boundaries through long‐term processes such as subduction and continental collision. However, the pre‐Cenozoic mountain‐building history of deep‐time orogenic systems in northeastern Pangaea remains poorly constrained due to later tectonic overprinting and denudation.
Heng Peng, Licheng Wang, Jianqiang Wang, Yazuo Niu, Yahui Yue, Jingbo Sun, Bitian Wei, Chiyang Liu, Massimiliano Zattin, Lin Ding   +9 more
wiley   +1 more source