Results 41 to 50 of about 517 (105)

Late Pleistocene‐Holocene Paleosecular Variation Dating of Cave Sediments: Insights From Grotta Romanelli (Apulia, Italy)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.
Abstract Grotta Romanelli, located in southern Italy, is a natural coastal cave renowned for its exceptional stratigraphical record and its critical role in understanding the Middle Pleistocene‐Holocene geomorphological and paleoenvironmental evolution of the Mediterranean region.
E. Tema, L. Lanci, G. S. Mariani, P. Pieruccini, I. Mazzini, R. Sardella   +5 more
wiley   +1 more source

Extended and revised archaeomagnetic database and secular variation curves from Bulgaria for the last eight millennia [PDF]

, 2014
International audienceThe efforts of geophysicists to describe geomagnetic field behaviour in the past lead to creation of different geomagnetic field models.
Boyadzhiev, Y., Jordanova, N., Kostadinova-Avramova, M., Kovacheva, Meri, Lanos, Philippe   +4 more
core   +3 more sources

Assessing the Reliability of the Pseudo‐Thellier Estimates in Fired Ceramics and Source Clays

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 7, July 2025.
Abstract The geomagnetic field's intensity is key to understanding the Earth's core dynamics and their surface impacts. While the Thellier–Thellier method remains the standard for recovering absolute paleointensity from baked materials, it is time‐consuming and may alter magnetic mineralogy due to heating cycles. The pseudo‐Thellier method offers a non‐
Wilbor Poletti, Mikaelly G. Rocha, Plínio Jaqueto, Gelvam A. Hartmann, Grasiane L. Mathias, Daniele Brandt, Ricardo I. F. Trindade, Paulo Maximiano   +7 more
wiley   +1 more source

Directional changes of the geomagnetic field in West Africa: Insights from the metallurgical site of Korsimoro [PDF]

, 2016
This work shows the first archeomagnetic directions from Western Africa measured on 32 iron smelting kilns dated between 650 and 1800 AD. The archeological excavation of the vast metallurgical site of Korsimoro established the existence of four distinct ...
Donadini, Fabio, El Kateb, Akram, Kapper, Lisa, Serneels, Vincent   +3 more
core  

Low Geomagnetic Field Intensity in Southern China 6,000 Years Ago

Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract The West Pacific Anomaly (WPA), a low geomagnetic field anomaly observed in the 16th to 18th centuries, represents a recently recognized and complex feature of Earth's magnetic field. However, the history of the WPA is still uncertain due to a scarcity of paleointensity data in Southeast Asia.
Xin Luo, Jiabo Liu, Huapei Wang, Maximilian Schanner, Yuan Zhang, Peng Xie, Jigen Tang, Peng Han, Quan Li, Fei Han, Xiaowei Chen, Chen Wen, Wen Zhong, Yufan Hu, Qingsong Liu   +14 more
wiley   +1 more source

Sedimentary Iron Cycling and the Origin and Preservation of Magnetization in Platform Carbonate Muds, Andros Island, Bahamas [PDF]

, 2007
Carbonate muds deposited on continental shelves are abundant and well-preserved throughout the geologic record because shelf strata are difficult to subduct and peritidal carbonate units often form thick, rheologically strong units that resist ...
Bosak, Tanja, Fike, David A., Grotzinger, John P., Kirschvink, Joseph L., Kopp, Robert E., Maloof, Adam C., Poussart, Pascale M., Vali, Hojotollah, Weiss, Benjamin P.   +8 more
core   +1 more source

A Holocene Paleosecular Variation Record From the Northwestern Ross Sea, Antarctica

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 2, February 2025.
Abstract We present a mid‐to‐late Holocene record of relative paleosecular variation from the Ross Sea region of Antarctica. The 6,700‐year‐long record of inclination, declination, and relative paleointensity from a marine sediment core collected near Cape Adare is independently dated using a combination of ramped pyrolysis oxidation and carbonate ...
Olivia J. Truax, Faye Nelson, Christina R. Riesselman, Christian Ohneiser, Jae Il Lee, Kyu‐Cheul Yoo, Bob Dagg, Gary Wilson   +7 more
wiley   +1 more source

Radiocarbon and Oxidizable Carbon Ratio Dates from Archaeological Sites in East Texas, Part II [PDF]

, 1998
This paper presents a second compilation of recently obtained radiocarbon and oxidizable carbon ratio dates obtained from archaeological sites in East Texas.
Perttula, Timothy K.
core   +1 more source

Paleomagnetic Imprints of Sulfate Reduction Pathways in Continental Shelf Sediments: Organoclastic Versus Anaerobic Oxidation of Methane

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 12, December 2024.
Abstract Marine continental shelf sediments with high deposition rates may provide useful archives of rapid geomagnetic secular variation as long as the primary magnetization is not altered substantially by diagenesis. To quantify the effects of sulfate (SO42‐) reduction, which is a dominant early diagenetic process in such sediments, on paleomagnetic ...
Yakar Zemach, Ron Shaar, Orit Sivan, Barak Herut, Orit Hyams‐Kaphzan, Oded Katz, Andrew P. Roberts   +6 more
wiley   +1 more source

Time-variability in the Interstellar Boundary Conditions of the Heliosphere: Effect of the Solar Journey on the Galactic Cosmic Ray Flux at Earth

, 2011
During the solar journey through galactic space, variations in the physical properties of the surrounding interstellar medium (ISM) modify the heliosphere and modulate the flux of galactic cosmic rays (GCR) at the surface of the Earth, with consequences ...
A. Yeghikyan, B. Wolff, B.E. Wood, C. Heiles, C.P. Sonett, D.M. Meyer, E. Möbius, G. Hebrard, G.P. Zank, H. Müller, H. Müller, H.-R. Müller, Hans-Reinhard Mueller, I.G. Usoskin, J. Goldston Peek, J. Kirkby, J.D. Slavin, J.T. Gosling, K.G. McCracken, K.G. McCracken, L.A. Fisk, M. Salvati, M. Wolleben, M.A.C. Perryman, N.V. Pogorelov, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, P.C. Frisch, Priscilla C. Frisch, R. Lallement, R. Muscheler, R. Schönrich, R.A. Leske, R.A. Leske, R.A. Mewaldt, R.C. Bohlin, S. Redfield, S. Redfield, S. Redfield, S. Stanimirović, T.E. Holzer, U. Haud, V. Florinski, V. Florinski, W.R. Webber   +48 more
core   +1 more source