Results 61 to 70 of about 181 (155)

A Lake Record of Geomagnetic Secular Variations for the Last 23 ka From Lake Chala: Toward a Composite Directional Lake Record of the Earth's Magnetic Field for Equatorial East Africa

Geochemistry, Geophysics, Geosystems
The documentation and understanding of variations in the Earth's magnetic field through time is fundamental for several disciplines, but current geomagnetic models rely on datasets heavily biased toward the mid‐ and high northern latitudes.
A. Di Chiara, M. W. Hounslow, B. A. Maher, V. Karloukovski, M. Van Daele, M. Blaauw, D. Verschuren   +6 more
doaj   +1 more source

Paleomagnetic and rock-magnetic survey of Brunhes lava flows from Tancitaro volcano, Mexico [PDF]

Geofísica Internacional, 2009
This study presents paleomagnetic results from Tancitaro volcanism in the Michoacan Guanajuato Volcanic Field, western Mexico, as a contribution to the time averaged field global database. Detailed paleomagnetic and rock-magnetic studies were carried out
C. Caballero Miranda, J. Urrutia Fucugauchi, L. Alva Valdivia, J. Morales, B. Aguilar Reyes, V. C. Ruíz Martínez, V. H. Garduño Monroy, A. Goguitchaichvili, R. Maciel Peña, A. Goguitchaichvili, V. H. Garduño Monroy, V. C. Ruiz Martinez, B. Aguilar, Reyes, J. Morales L. Alva-Valdivia, C. Caballero Miranda and J. Urrutia-Fucugauchi   +8 more
doaj  

Late Mesoproterozoic Rapid True Polar Wander Recorded in the Jingeryu Formation, North China Craton

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 8, August 2025.
Abstract Disentangling short‐duration (≤10 Ma) true polar wander (TPW) events in the Precambrian presents a significant challenge, necessitating the acquisition of high‐resolution and ‐quality paleomagnetic data and well‐determined age relations. This study reports new paleomagnetic results from carbonate sequences of the Jingeryu Formation in the ...
Hanqing Zhao, Shihong Zhang, Jikai Ding, Qiang Ren, Jianping Qu, Kunkun Yang, Haiyan Li, Tianshui Yang, Huaichun Wu   +8 more
wiley   +1 more source

Sedimentary environment, lithostratigraphy and dating of sediment sequences from Arctic lakes Revvatnet and Svartvatnet in Hornsund, Svalbard

Polish Polar Research, 2016
The sedimentary environment, sediment characteristics and age-depth models of sediment sequences from Arctic lakes Revvatnet and Svartvatnet, located near the Polish Polar Station in Hornsund, southern Svalbard (77°N), were studied with a view to ...
Ojala Antti E.K., Arppe Laura, Luoto Tomi P., Wacker Lukas, Kurki Eija, Zajączkowski Marek, Pawłowska Joanna, Damrat Mateusz, Oksman Mimmi   +8 more
doaj   +1 more source

Termination of Laurentia's Rapid Plate Motion at the Start of the Grenvillian Orogeny

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 8, August 2025.
Abstract Late Mesoproterozoic to Neoproterozoic sedimentary sequences within the Lake Superior region preserve critical paleogeographic records of the position of Laurentia spanning from the end of Midcontinent Rift extension through to the end of the Grenvillian Orogeny.
Anthony J. Fuentes, Luke M. Fairchild, Eben B. Hodgin, Tadesse Alemu, Nicholas Swanson‐Hysell   +4 more
wiley   +1 more source

Detecting and correcting for paleomagnetic inclination shallowing of sedimentary rocks: A review

Frontiers in Earth Science, 2016
Magnetic anisotropy and the elongation/inclination (E-I) approaches have been increasingly employed as two important means for detecting and correcting the paleomagnetic inclination shallowing in sedimentary rocks that was first recognized sixty years ...
Yong-Xiang eLi, Kenneth P. Kodama
doaj   +1 more source

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

Geochemistry, Geophysics, Geosystems
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 ...
E. Tema, L. Lanci, G. S. Mariani, P. Pieruccini, I. Mazzini, R. Sardella   +5 more
doaj   +1 more source

Paleomagnetism of Young New Zealand Basalts and Longitudinal Distribution of Paleosecular Variation.

Journal of geomagnetism and geoelectricity, 1995
A paleosecular variation (PSV) study was carried out on monogenic basalt volcanoes of the northern part of North Island, New Zealand. A new method of calculating angular standard deviation (ASD) by fitting a combination of two Fisher distributions to the cumulative histogram of VGP data is presented, which avoids the necessity of applying an arbitrary ...
Shibuya, Hidetoshi, Cassidy, John, Smith, Ian E. M., Itaya, Tetsumaru   +3 more
openaire   +2 more sources

A comprehensive paleomagnetic study from the last Plinian eruptions of Popocatepetl volcano: absolute chronology of lavas and estimation of emplacement temperatures of PDCs

Earth, Planets and Space, 2019
Three lava flows (Buenavista, Xalitzintla and Nealtican) and pyroclastic density currents (Lorenzo and Pink Pumice) from two Popocatepetl Plinian eruptions were sampled for paleomagnetic dating.
Nayeli Pérez-Rodríguez, Juan Morales, Avto Goguitchaichvili, Felipe García-Tenorio   +3 more
doaj   +1 more source

A detailed paleomagnetic and rock-magnetic investigation of the Matuyama-Bruhnes geomagnetic reversal recorded in tephra-paleosol sequence of Tlaxcala(Central Mexico)

Frontiers in Earth Science, 2015
Geomagnetic reversals are global phenomena, for about 50 years the paleomagnetists attempted to acquire as many detailed records as possible using the magnetic memory of sediments and lava flows.
Ana Maria Soler-Arechalde, Avtandyl eGoguitchaichvili, Ángel eCarrancho, Sergey eSedov, Cecilia Irene Caballero-Miranda, Beatriz eOrtega, Berenice eSolís, Juan Julio Morales Contreras, Jaime eUrrutia-Fucugauchi, Francisco eBautista   +9 more
doaj   +1 more source