Results 41 to 50 of about 4,304 (252)
The effects of aliasing and lock-in processes on palaeosecular variation records from sediments [PDF]
, 2000 Studies of sedimentary records of palaeointensity variation report periods as long as 50 kyr. Archaeointensity data show geomagnetic periods of 2 kyr with large ampli-tudes.
Gubbins, D., Teanby, N.
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Frontiers in Earth Science, 2018 Investigating volcanic paleointensity during the Holocene is important for linking archeointensity and sedimentary paleointensity. Across the globe, the island of Hawaii is one of the most studied subaerial locations.
Yuhji Yamamoto, Ryo Yamaoka
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Paleointensity Estimates From Ignimbrites: The Bishop Tuff Revisited
Geochemistry, Geophysics, Geosystems, 2018 Volcanic ash flow tuffs (ignimbrites) may contain single domain‐sized (titano) magnetite that should be good for recording geomagnetic field intensity, but due to their complex thermal histories also contain other magnetic grains, which can complicate ...
Margaret S. Avery +3 more
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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 +2 more
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Solar activity during the Holocene: the Hallstatt cycle and its consequence for grand minima and maxim [PDF]
, 2016 Cosmogenic isotopes provide the only quantitative proxy for analyzing the long-term solar variability over a centennial timescale. While essential progress has been achieved in both measurements and modeling of the cosmogenic proxy, uncertainties still ...
Gallet, Y. +4 more
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Geochemistry, Geophysics, Geosystems, 2021 The theory for recording of thermally blocked remanences predicts a quasilinear relationship between low fields like the Earth's in which rocks cool and acquire a magnetization.
L. Tauxe +6 more
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Paleointensity database provides new resource
Eos, Transactions American Geophysical Union, 1994 A global paleointensity database constructed from all published data based on volcanic rocks in geological time older than 0.03 Ma is now available and ready for use. It can be obtained from the authors as text files on a 3.5″ diskette in MS‐DOS or Macintosh format or via e‐mail. It includes not only major parameters, but also minor details that can be
Hidefumi Tanaka, Masaru Kono
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, 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 +11 more
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Microwave paleointensity analysis of historic lavas from Paricutín volcano, Mexico [PDF]
Geofísica Internacional, 2005 We report a microwave paleointensity study of historic lavas from Paricutin volcano, erupted during the period between 1943 and 1948. Most samples are characterized by uni-vectorial orthogonal plots.
T. González-Morán +5 more
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Geophysical Research Letters, 2022 Paleointensities are key to understanding the formation and evolution of Earth and are determined from rocks which record magnetic fields upon cooling; however, experimental protocols for estimating paleointensities frequently fail. The primary reason is
Lesleis Nagy +3 more
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