Results 41 to 50 of about 317 (130)

Mono Lake or Laschamp geomagnetic event recorded from lava flows in Amsterdam Island (southeastern Indian Ocean)

, 2003
We report a survey carried out on basalt flows from Amsterdam Island in order to check the presence of intermediate directions interpreted to belong to a geomagnetic field excursion within the Brunhes epoch, completing this paleomagnetic record with ...
Bernard Henry, Camps, Claire Carvallo, Dunlop, Gilles Ruffet, Guyodo, Hoffman, Hoffman, Pierre Camps, T. Poidras, Tauxe, Vinogradov   +11 more
core   +4 more sources

The Lino Site: A Stratified Late Archaic Campsite in a Terrace of the San Idelfonzo Creek, Webb County, Southern Texas [PDF]

, 2000
Archeologists from TRC Mariah Associates Inc. of Austin conducted mitigation excavations at the Lino site (41WB437) during a six-week period in April and May 1998 under contract with the Texas Department of Transportation, Environmental Affairs Division.
Lintz, Chris, Quigg, J. Michael, Smith, Grant, Wilcox, Scott   +3 more
core   +2 more sources

An archeomagnetic example of polyphase magnetization.

Journal of geomagnetism and geoelectricity, 1986
An unusual archeological example of multiple heating leading to superimposed thermoremanent magnetizations (TRM's) is described. The samples involved are roof-tiles which have been incorporated into the floor of a 6th century A. D. kitchen oven at a site near Potenza in southern Italy. Up to 300°C, thermal demagnetization reveals a pattern of diverging
Michael E. EVANS, Marianne MARESCHAL
openaire   +2 more sources

Bayesian Inference of Local Paleosecular Variation From Sparse Paleomagnetic Data

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract We introduce a novel Bayesian method to construct local paleosecular variation (PSV) curves. By modeling the geomagnetic field as a Gaussian process, global models can be incorporated as informative prior distributions. Because we use Hamiltonian Monte‐Carlo methods, complex age distributions resulting for example from radiocarbon calibration ...
M. A. Schanner, R. Meyer, L. V. de Groot
wiley   +1 more source

Necessary Core‐Mantle Boundary Heat Flux Patterns for Recovering the Latitude of the South Atlantic Anomaly

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract The present‐day geomagnetic field at Earth's surface is characterized by an anomalously weak region known as the South Atlantic Anomaly (SAA). Numerical dynamo simulations with an imposed outer boundary heat flux pattern inferred from lowermost mantle seismic anomalies reproduce well the longitude of the SAA, but the latitudes of the modeled ...
Filipe Terra‐Nova, Hagay Amit
wiley   +1 more source

Perspectivas de los estudios de arqueomagnetismo en Sudamérica [PDF]

, 2014
Archaeomagnetism is the study of past geomagnetic field variations using bricks, pottery and campfire stones. This is a multidisciplinary work in which archaeologists, historians and geophysicists play important roles.
Bocco, G., Gogorza, Claudia Susana, Goguichaishvili, Avto, Greco Mainero, Mariano Catriel, Morales, Juan, Rapalini, Augusto Ernesto   +5 more
core   +1 more source

Geomagnetic Dipole Strength During the Cretaceous Normal Superchron Recorded by Baked Sediments From Hainan (SE Asia)

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract The Cretaceous Normal Superchron constitutes an enigmatic ∼37‐Myr interval of stable polarity in the history of the Earth's magnetic field. The strength of the geomagnetic dipole moment during this interval is controversial, with absolute paleointensity determinations on crystallized volcanic rocks, volcanic glasses, and silicate crystals ...
Yuchen Chi, Florian Lhuillier, Jun Meng, Chunyang Zhang, Valeriy P. Shcherbakov   +4 more
wiley   +1 more source

Tephra Deposits of the Tajogaite Volcano, La Palma: Changes of Magnetic Properties Through the 2021 Eruption

Geophysical Research Letters, Volume 52, Issue 15, 16 August 2025.
Abstract We report the results of a rockmagnetic study of tephra material produced by the Tajogaite volcano, in La Palma (Canary Islands), during 19 September through 13 December 2021. Our magnetic analysis reveals a change of rock magnetic properties through the eruption.
J. M. Parés, V. Soler, M. F. Bógalo, M. Calvo, A. Carrancho, E. Vernet   +5 more
wiley   +1 more source

Rock magnetic characterization of archeological pottery and natural materials from the Kiya petroglyph site (Russia): an insight into post-burial alteration

Evolving Earth
While processes that lead to recording magnetic information in stone and ceramic artifacts have been extensively investigated, the preservation of archeomagnetic signal after the artifacts have been abandoned has received much less attention.
Alexandra Abrajevitch, Andrey S. Samynin
doaj   +1 more source

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