Results 31 to 40 of about 726 (131)

Identification and correlation of the Aso‐3 tephra in the Omaezaki area, central Japan: A valuable key stratum for the MIS 6/5 transition period

Journal of Quaternary Science, Volume 41, Issue 6, Page 972-986, August 2026.
ABSTRACT The Aso‐3 tephra is one of the most significant widespread marker layers from the Middle to Late Pleistocene, generated by a large caldera‐forming eruption at the Aso volcano in Kyushu, southwestern Japan. Despite its importance, a distal co‐ignimbrite ash correlative has yet to be clearly identified, primarily because although volcanic glass ...
Toshinori Sasaki, Takuya Morimoto, Tatsuyuki Ueno, Kazuo Mizoguchi, Norihisa Goto, Hisanori Ominami, Shohei Onaka   +6 more
wiley   +1 more source

Reappraisal of Holocene Caldera Resurgence at Campi Flegrei (Southern Italy): A Long‐Lived Magma‐Driven Resurgent Dome System

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract Caldera systems commonly experience inner resurgence, which shapes patterns of volcanic activity. However, incomplete reconstructions of past ground deformation can lead to incorrect recognition of precursory signals. The Campi Flegrei caldera (Italy) provides an exceptional opportunity to address this issue as uplifted marine sediments ...
Jacopo Natale, Stefano Vitale
wiley   +1 more source

Magnetic mineralogy in Barranca Tlalpan exposure paleosols, Tlaxcala, Mexico

Revista Mexicana de Ciencias Geológicas, 2018
The knowledge of past climatic and environmental conditions in central Mexico, interpreted extensively from lacustrine records, is restricted to the last ca. 50,000 years.
Beatriz Ortega-Guerrero, Sergey Sedov, Elizabeth Solleiro-Rebolledo, Ana Soler   +3 more
doaj  

Dansgaard‐Oeschger Events Recorded in Low‐Latitude Marine Sediments and Teleconnection With High‐Latitude Climate Variations

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Dansgaard‐Oeschger (D‐O) events are millennial‐scale high‐latitude climate oscillations with abrupt climate transitions between stadial and interstadial conditions, which are well recorded in and outside of high northern latitudes. However, their signal propagation mechanisms from high to low latitudes are uncertain.
Zhanjie Liu, Zhaoxia Jiang, Long Chen, Andrew P. Roberts, Sanzhong Li, Liang Chen, Zhengxin Yin, Wanxin Liu, Yulong Guan, Yuzhen Zhang   +9 more
wiley   +1 more source

Subkurgan Paleosoils of the Lower Volga Steppes as Indicators of Climate Dynamics over an Historical Epoch

Поволжская археология, 2013
The studies of paleosoils buried beneath burial mounds of the Early, Middle, and Late Sarmatian time (4th c. BC to 4th c. AD) were carried out in the dry and desert steppes of the Lower Volga river area (the Volga and Yergenino uplands, the Caspian ...
Demkin Vitaliy A. , Demkina Tatyana S. , Khomutova Tatyana E.   +2 more
doaj   +1 more source

Substantial Accumulation of Chemically Oxidizable Organic Carbon in Continental Margin Sediments

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract The balance between organic carbon (OC) sequestration and oxidation regulates the oceanic carbon cycle, and OC reactivity determines its susceptibility to remineralization or long‐term burial. However, the stability of sedimentary OC on continental margins remains poorly understood.
Yufan Zhang, Xueshi Sun, Dejiang Fan, Ming Liu, Jingbo Chen, Houjie Wang   +5 more
wiley   +1 more source

The State of Microbial Communities in Paleosoils of the Solonetz Complex on the Severnye Yergeni Upland as Indicator of Climate Humidity in the Mid-Sarmatian Age (1st Century AD)

Поволжская археология, 2013
The total and live biomass, the abundance and ecological-trophic structure of microbial communities in the paleosoils of the solonetz complex buried beneath the mid-Sarmatian (1st century AD) kurgan, located in the dry steppe zone of the Severnye Yergeni
Khomutova Tatyana E. , Demkina Tatyana S. , Kashirskaya Natalya N. , Demkin Vitaliy A.   +3 more
doaj   +1 more source

Synchronous Advance of the Alpine Glaciation Across the Northern and Southern Tibetan Plateau During the Mid‐Pleistocene Transition

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Chronological studies of glacial sediments from the Shishapangma and Yarlung Tsangpo River valley indicate that Quaternary glaciation on the southern Tibetan Plateau commenced at ∼0.75–0.83 Ma. However, the oldest glacial deposits in the northern plateau are dated to only ∼0.46 Ma, markedly later than the Middle Pleistocene glacial ...
Chengying Liu, Benhong Guo, Wenjiao Xiao, Zaijun Li, Linkai Wang, Fei Wang   +5 more
wiley   +1 more source

Taxonomic reassessment of fossil Sequoia and Protosequoia from the Upper Miocene of Central Honshu, Japan, with implications for leaf morphological variation in extant S. sempervirens

American Journal of Botany, Volume 113, Issue 7, July 2026.
Abstract Premise Since its emergence in the Mesozoic, Sequoia (Cupressaceae) has been considered to possess conserved leaf morphology. However, recent studies have shown that the leaves of extant S. sempervirens become smaller, with a scale form, with increasing tree height.
Shun Ikeda, Arata Momohara
wiley   +1 more source

Spatial and vertical distribution of redox‐sensitive elements and their controlling factors in deep soils under contrasting land cover in the Gulf Coastal Plains

Vadose Zone Journal, Volume 25, Issue 4, July/August 2026.
Abstract Redox processes in soil governs key biogeochemical cycles and influence carbon, nitrogen, and phosphorus dynamics. However, their role in deep vadose zone soils remains poorly understood, particularly in variably saturated environments with heterogeneous hydroclimatic, landscape position, and land use conditions.
Amir Sedaghatdoost, Binayak P. Mohanty
wiley   +1 more source