Results 31 to 40 of about 4,431,213 (212)

Paleosecular variation record from Pleistocene-Holocene lava flows in southern Colombia

Physics of the Earth and Planetary Interiors, 2022
de Oliveira, Wellington P, Hartmann, Gelvam A, Savian, Jairo F, Rodriguez, Giovanny N, Parra, Mauricio, Biggin, Andrew J, Trindade, Ricardo IF   +6 more
openaire   +3 more sources

A Feasibility Study of Microbialites as Paleomagnetic Recorders

Frontiers in Earth Science, 2021
Microbialites–layered, organosedimentary deposits–exist in the geologic record and extend back in deep time, including all estimated times of inner core nucleation.
Ji-In Jung, Julie A. Bowles
doaj   +1 more source

Current status and problems of magnetostratigraphic scale development for Kamchatka in the Brunhes epoch. Part 1. Theoretical aspect

Учёные записки Казанского университета: Серия Естественные науки, 2022
Magnetostratigraphy has become increasingly popular among geologists worldwide, as evidenced by recent scientific publications. This article reviews the role and place of magnetostratigraphy in general stratigraphic studies.
A.G. Zubov
doaj   +1 more source

TIMESCALES OF MAGMATIC FRACTIONATION DOCUMENTED BY PALEOSECULAR VARIATION IN BASALT DRILL CORE, SNAKE RIVER PLAIN VOLCANIC PROVINCE

Goldschmidt2023 abstracts, 2023
The timescales over which fractional crystallization and recharge work in mafic volcano-plutonic sequences is subject to great uncertainty. Currently modeled processes are subject to the scale of measurement: monogenetic basalt fields accumulate over ...
J. Shervais, K. Potter
semanticscholar   +1 more source

The Cretaceous Normal Superchron: A Mini-Review of Its Discovery, Short Reversal Events, Paleointensity, Paleosecular Variations, Paleoenvironment, Volcanism, and Mechanism

Frontiers in Earth Science, 2022
The Cretaceous Normal Superchron (CNS) was first defined in the 1960s to explain the Cretaceous Quiet Zone in marine magnetic anomaly profiles, which includes no or fewer geomagnetic reversals.
Yutaka Yoshimura
doaj   +1 more source

High-Fidelity Archeointensity Results for the Late Neolithic Period From Central China [PDF]

, 2020
Archeomagnetism focuses on exploring high-resolution variations of the geomagnetic field over hundreds to thousands of years. In this study, we carried out a comprehensive study of chronology, absolute and relative paleointensity on a late Neolithic site
Cai, S, Deng, C, Pan, Y, Qin, H, Tauxe, L, Wang, W, Yang, L   +6 more
core   +1 more source

Plio-Pleistocene time-averaged field in southern Patagonia recorded in lava flows [PDF]

, 2004
Paleomagnetic directions were obtained from stepwise alternating-field or thermal demagnetization of 53 lava flows from southern Patagonia (latitudes 49.5°-52.1 °S) that include the Pali-Aike volcanic field and the Meseta Viscachas plateau lavas.
Mejia, V., Opdyke, N. D., Singer, B. S., Stoner, J. S., Vilas, Juan Francisco A.   +4 more
core   +1 more source

A simplified statistical model for the geomagnetic field and the detection of shallow bias in paleomagnetic inclinations: Was the ancient magnetic field dipolar? [PDF]

, 2004
The assumption that the time-averaged geomagnetic field closely approximates that of a geocentric axial dipole (GAD) is valid for at least the last 5 million years and most paleomagnetic studies make this implicit assumption.
Kent, Dennis V., Tauxe, Lisa
core   +2 more sources

Consistent and Contrasting Aspects of the Geomagnetic Field Across Epochs With Distinct Reversal Frequencies Revealed by Modeling the Kiaman Superchron

Geochemistry, Geophysics, Geosystems, 2021
This work presents an extensive directional paleomagnetic database of the Kiaman reversed superchron. It is composed of 1,459 paleomagnetic directions from igneous rocks corresponding to 91 data sets (or paleomagnetic poles).
Daniele Brandt, Marcia Ernesto, Catherine Constable   +2 more
doaj   +1 more source

Persistent shallow magnetic inclination in the past 5 million years with implications for regional tectonics in the Philippines

Journal of Asian Earth Sciences: X, 2021
Despite the growing knowledge on geomagnetic paleosecular variations, the region around the Philippine archipelago remains to be a huge data gap in this regard. This work looked into rock magnetic information from
Decibel V. Faustino-Eslava, Hidetoshi Shibuya, Carla B. Dimalanta, Graciano P. Yumul, Jr., Jonathan T. Macuroy   +4 more
doaj   +1 more source