Results 31 to 40 of about 2,783,264 (171)

A relative paleointensity record of the geomagnetic field since 1.6 Ma from the North Pacific [PDF]

, 2007
A paleomagnetic study was conducted on a sediment core KR0310-PC1 taken from the central North Pacific in order to obtain a relative paleointensity record in the Matuyama chron from this region. The core reached to about 1.6 Ma.
Kanamatsu, Toshiya, Yamazaki, Toshitsugu, Toshitsugu Yamazaki, Toshiya Kanamatsu   +3 more
core   +2 more sources

Cosmogenic 10Be as a Tracer for Recent Heliospheric Encounters With Interstellar Cold Clouds and Nearby Supernovae

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Recent works suggest there are periods when the Sun encountered massive interstellar cold clouds which compressed the heliosphere to within Earth's orbit, exposing Earth to interstellar galactic cosmic rays and energetic particles of heliospheric origin.
Anna Nica, Merav Opher, Jesse A. Miller, Jennifer L. Middleton, Joe Giacalone   +4 more
wiley   +1 more source

(Fig. 11) Pseudo-Thellier relative paleointensity (PT-RPI) estimates of sediment core GeoB6007-2

, 2010
(Fig. 11) Pseudo-Thellier relative paleointensity (PT-RPI) estimates of sediment core GeoB6007-
Bleil, Ulrich, Dillon, Melanie, Ulrich Bleil (6962114), Melanie Dillon (6965366)   +3 more
core   +1 more source

A full sequence of the Matuyama–Brunhes geomagnetic reversal in the Chiba composite section, Central Japan

Progress in Earth and Planetary Science, 2020
Geological records of the Matuyama–Brunhes (M–B) geomagnetic reversal facilitate the development of an age model for sedimentary and volcanic sequences and help decipher the dynamics of the Earth’s magnetic field.
Yuki Haneda, Makoto Okada, Yusuke Suganuma, Takahiro Kitamura   +3 more
doaj   +1 more source

Chronological Assessment of the Balta Alba Kurgan Loess-Paleosol Section (Romania) – A Comparative Study on Different Dating Methods for a Robust and Precise Age Model

Frontiers in Earth Science, 2021
Loess-paleosol sequences (LPSs) are important terrestrial archives of paleoenvironmental and paleoclimatic information. One of the main obstacles for the investigation and interpretation of these archives is the uncertainty of their age-depth ...
Stephanie Scheidt, Sonja Berg, Ulrich Hambach, Ulrich Hambach, Nicole Klasen, Stephan Pötter, Alexander Stolz, Daniel Veres, Christian Zeeden, Dominik Brill, Helmut Brückner, Stephanie Kusch, Christian Laag, Christian Laag, Frank Lehmkuhl, Martin Melles, Florian Monnens, Lukas Oppermann, Janet Rethemeyer, Janina J. Nett   +19 more
doaj   +1 more source

Rates of Geomagnetic Field Change During Excursions and Reversals

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 10, October 2026.
Abstract The Earth's magnetic field is characterized by complex changes, reflecting various geodynamo processes. Paleomagnetic studies have provided evidence of geomagnetic polarity reversals and excursions throughout Earth's history. We use data‐based paleomagnetic field models (LSMOD.2, GGFSS70, and GGFMB) and the axial dipole moment reconstruction ...
Sunaina Shinu, Ahmed Nasser Mahgoub, Monika Korte   +2 more
wiley   +1 more source

(Fig. 9) NRM20mT/ARM20mT and NRM20mT/SIRM20mT relative paleointensity estimates after 20 mT AF demagnetization of sediment core GeoB8601-3

, 2010
(Fig. 9) NRM20mT/ARM20mT and NRM20mT/SIRM20mT relative paleointensity estimates after 20 mT AF demagnetization of sediment core GeoB8601-
Bleil, Ulrich, Dillon, Melanie, Ulrich Bleil (6962114), Melanie Dillon (6965366)   +3 more
core   +1 more source

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

Global Implications of Terrain‐Induced Bias in Paleomagnetic Data From 3D Forward Modeling of Mt. Etna

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract In paleomagnetism, records of paleosecular variation (PSV) on centennial timescales are often based on magnetic measurements from lava flows. However, samples from recent flows that cooled in known magnetic fields often fail to produce the expected paleomagnetic directions, and samples from the same flow often show large within‐ and between ...
A. E. Hendrickx, C. Thieulot, L. V. de Groot   +2 more
wiley   +1 more source

Automated Mineral Identification and Rock‐Type Classification of Lunar Mare Basalts Using SEM Images

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.
Abstract We present an automated system for identifying minerals and classifying rock types in Apollo lunar mare basalts using scanning electron microscopy (SEM) imagery. Mineral segmentation is based on a U‐Net architecture, supplemented by two scale‐aware models designed to incorporate pixel size information.
Ji‐In Jung, Sonia M. Tikoo, Jaehong Chung, Claire I. O. Nichols   +3 more
wiley   +1 more source