Results 71 to 80 of about 4,431,213 (212)

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

Spectral analysis and modeling of microcyclostratigraphy in late Paleozoic glaciogenic rhythmites, Paraná Basin, Brazil

Geochemistry, Geophysics, Geosystems, 2011
We investigate the depositional time scale of lithological couplets (fine sandstone/siltstone–siltstone/mudstone) from two distinctive outcrops of Permo‐Carboniferous glacial rhythmites in the Itararé Group (Paraná Basin, Brazil).
Daniel R. Franco, Linda A. Hinnov, Marcia Ernesto   +2 more
doaj   +1 more source

New Paleointensity Data Suggest Possible Phanerozoic‐Type Paleomagnetic Variations in the Precambrian

Geochemistry, Geophysics, Geosystems, 2021
The state of the geomagnetic field throughout the Precambrian era is largely unknown. Approximately 8% of global paleointensity records account for ∼4 billion years of Earth history.
Simon J. Lloyd, Andrew J. Biggin, Zheng‐Xiang Li   +2 more
doaj   +1 more source

Rock-magnetic properties of TRM carrying baked and molten rocks straddling burnt coal seams [PDF]

, 2001
The subsurface spontaneous combustion of coal seams in Xinjiang (NW China) during Pleistocene to recent times produced large areas of thermally altered sedimentary rocks with large magnetic moments.
Boer, C.B. de, Dekkers, M.J., Hoof, Ton A.M. van   +2 more
core   +1 more source

New Insights Into the Proposed Geomagnetic Excursion Hilina Pali From High‐Resolution Lake Sediment Cores From the Polar Ural Mountains, Arctic Russia

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract This study presents paleomagnetic records from three 24 m‐long sediment cores from the neighboring lakes Bolshoye Shchuch'ye and Maloye Shchuch'ye, located about 10 km apart in the Polar Urals in northern Russia. The age model, based on radiocarbon dating and varve counting, shows that the sediment sequences reach back up to about 23.5 ka cal.
S. Scheidt, S. Ólafsdóttir, J. Brendryen, N. R. Nowaczyk, M. M. Lenz, J. I. Svendsen, H. Haflidason   +6 more
wiley   +1 more source

Paleomagnetic Dating of Sediments in Caves Opened During Highway Construction Near Kozina, Slovenia

Acta Carsologica, 2016
V članku poročamo o paleomagnetizmu jamskih sedimentov v JZ Sloveniji. Vzorci so bili vzeti iz dveh denudiranih jam, ki sta se v letu 1999 odprli ob gradnji avtoceste pri Kozini. Vsi vzorci so pokazali normalno magnetno polariteto. Imeli so dobro vzorčno
Stanka Šebela, Ira D. Sasowsky
doaj   +1 more source

Quantifying Inclination Shallowing and Representing Flattening Uncertainty in Sedimentary Paleomagnetic Poles

Geochemistry, Geophysics, Geosystems, 2022
Inclination is the angle of a magnetization vector from horizontal. Clastic sedimentary rocks often experience inclination shallowing whereby syn‐ to post‐depositional processes result in flattened detrital remanent magnetizations relative to local ...
James Pierce, Yiming Zhang, Eben B. Hodgin, Nicholas L. Swanson‐Hysell   +3 more
doaj   +1 more source

Bending the Sierra Madre Oriental: A Paleocene Orocline

Tectonics, Volume 44, Issue 11, November 2025.
Abstract The Sierra Madre Oriental belt of the Mexican thin‐skinned fold‐and‐thrust belt, which formed during the Late Cretaceous due to the subduction of the Farallon Plate beneath North America, exhibits a pronounced curvature of approximately 100°, concave to the southwest.
Rafael Guerra Roel, Gabriel Chávez‐Cabello, José Jorge Aranda Gómez, Mark J. Dekkers, Gerardo Patiño Méndez, Daniel Pastor‐Galán   +5 more
wiley   +1 more source

Depopulation of the Northern Border of Mesoamerica during the Early Postclassic: Evidence from the Reappraisal of Archaeomagnetic Data

Land, 2022
The Mesoamerican Postclassic and Epiclassic were periods of drastic change and transformation related to social, political and economic aspects as well as settlement patterns.
Alejandra García Pimentel, Avto Goguitchaichvili, Carlos Torreblanca, Vadim Kravchinsky, Miguel Cervantes, Rafael García, Rubén Cejudo, Francisco Bautista, Juan Morales   +8 more
doaj   +1 more source

Variability of Millennial-Scale Trends in the Geomagnetic Axial Dipole [PDF]

, 2019
The historical trend in the axial dipole is sufficient to reverse the field in less than 2 kyr. Assessing the prospect of an imminent polarity reversal depends on the probability of sustaining the historical trend for long enough to produce a reversal ...
Avery, MS, Buffett, B, Davis, W
core   +1 more source