Results 31 to 40 of about 614 (181)

Impact of Upward Oxygen Diffusion From the Oceanic Crust on the Magnetostratigraphy and Iron Biomineralization of East Pacific Ridge-Flank Sediments

Frontiers in Earth Science, 2021
Recent measurements of pore-water oxygen profiles in ridge flank sediments of the East Pacific Rise revealed an upward-directed diffusive oxygen flux from the hydrothermally active crust into the overlying sediment.
Adrian Felix Höfken, Adrian Felix Höfken, Tilo von Dobeneck, Tilo von Dobeneck, Thomas Kuhn, Sabine Kasten, Sabine Kasten, Sabine Kasten   +7 more
doaj   +1 more source

Correlation of peat sections of the Lower Priamurye based on the results of calculation of relative paleointensity

Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле
The paper considers the possibility of determining the age and correlating peat sections by solving the inverse problem of magnetostratigraphy based on the findings of comprehensive (palaeomagnetic, petromagnetic, microprobe, and radiocarbon) studies on ...
A.Yu. Peskov, A.N. Didenko, A.S. Karetnikov, M.A. Klimin, A.I. Tikhomirova, M.V. Arkhipov, N.V. Kozhemyako   +6 more
doaj   +1 more source

Palaeomagnetic and synchrotron analysis of >1.95 Ma fossil-bearing palaeokarst at Haasgat, South Africa

South African Journal of Science, 2014
Palaeomagnetic analysis indicates that Haasgat, a fossil-bearing palaeocave in the Gauteng Province of South Africa, is dominated by reversed magnetic polarity in its oldest, deepest layers and normal polarity in the younger layers.
Andy I.R. Herries, Peter Kappen, Anthony D.T. Kegley, David Patterson, Daryl L. Howard, Martin D. de Jonge, Stephany Potze, Justin W. Adams   +7 more
doaj   +1 more source

Event Deposits Recorded Over the Past 800 kyr in IODP Hole U1433A (South China Sea): Implications of a Revised Methodology for Chronology and Paleoclimate Reconstruction

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Instantaneous event deposits such as turbidites, debrites, and slumps are common and frequently occur in marginal seas. These instantaneous deposits represent seconds to days in duration, and can therefore significantly impact age‐depth models and interpretation of paleoclimate history based on thick sedimentary sequences recovered in deep ...
Xunpeng Li, Shuang Sun, Yuwei Zhang, Ziqiang Mao, Lina Jin, Yulong Zhao, G. Ian Alsop, Zhifei Liu, Yin Lu   +8 more
wiley   +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

High‐resolution record of geomagnetic excursions in the Matuyama chron constrains the ages of the Feiliang and Lanpo Paleolithic sites in the Nihewan Basin, North China

Geochemistry, Geophysics, Geosystems, 2012
The Nihewan Basin (40°N) in North China is a rich source of Early Pleistocene Paleolithic sites and thus a key area for studying early human evolution in high‐latitude (from an early human perspective) East Asia.
Hong Ao, Zhisheng An, Mark J. Dekkers, Qi Wei, Shuwen Pei, Hui Zhao, Hongli Zhao, Guoqiao Xiao, Xiaoke Qiang, Dacheng Wu, Hong Chang   +10 more
doaj   +1 more source

Tracing the Migration of Fronts in the Pacific Southern Ocean Across the Mid‐Pleistocene Transition

Paleoceanography and Paleoclimatology, Volume 41, Issue 7, July 2026.
Abstract The Southern Ocean is a key driver of global climate variability, yet its dynamics during the Mid‐Pleistocene Transition (MPT; ∼1.25–0.7 Ma) remain poorly understood, especially in the South Pacific sector. The Polar Frontal Zone (PFZ) underwent significant latitudinal shifts during this critical period of climate reorganization.
V. M. Sinnen, O. Esper, M. Duffy, C. R. Riesselman, F. Lamy, T. Frederichs, C. B. Lange   +6 more
wiley   +1 more source

Speleogenesis in a lens of metamorphosed limestone and ankerite: Ochtiná Aragonite Cave, Slovakia

International Journal of Speleology, 2021
The Ochtiná Aragonite Cave (Western Carpathians) represents an unique natural phenomenon. It originated under particular lithological and hydrogeological conditions of the Ochtiná Karst in which several isolated lenses of Paleozoic crystalline limestone (
Pavel Bella, Pavel Bosák, Petr Pruner, Helena Hercman, Katarína Pukanská, Karol Bartoš, Ľudovít Gaál, Dagmar Haviarová, Peter Tomčík, Šimon Kdýr   +9 more
doaj   +1 more source

Osmium Isotope and Highly Siderophile Element Constraints on the Cretaceous/Paleogene Boundary in Western Pacific Pelagic Clay

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract The Cretaceous/Paleogene (K/Pg) Chicxulub impact produced globally synchronous enrichments of highly siderophile elements (HSEs) and a pronounced decline in marine osmium isotope ratios (187Os/188Os), forming a key geochemical marker of the boundary.
Honami Sato, Yoichi Usui, Kazuhide Mimura, Akira Ishikawa, Kazutaka Yasukawa, Junichiro Ohta, Yasuhiro Kato   +6 more
wiley   +1 more source

A revision of the stratigraphyfor the Middle Pleistocene continentaI deposits of Rome(CentraI Italy): palaeomagnetic data

Annals of Geophysics, 1995
All improved knowledge of the stratigraphy of the Rome area has been achieved trom the interpretation and correlation of a large number of stratigraphic logs from drillings, stored in a data bank by the Istituto Nazionale di Geofisica which allowed the ...
F. Marra, F. Florindo
doaj   +1 more source