Results 81 to 90 of about 3,470 (247)
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.Abstract Paleomagnetic and rock magnetic analyses were conducted on sediment cores from the northeastern Greenland Shelf and Young Sound along the western edge of Fram Strait. The paleomagnetic signal in all three sediment cores is characterized by a strong and stable single component magnetization carried by low coercivity ferrimagnetic single domain ...
Juliette Girard +7 more
wiley +1 more source
Absolute Thellier paleointensities from Ponta Grossa dikes (southern Brazil) and the early Cretaceous geomagnetic field strength [PDF]
Geofísica Internacional, 2009 We report a detailed rock magnetic and Thellier paleointensity study from ~ 130.5 Ma Ponta Grossa Dike Swarms in Southern Brazil. Twenty-nine samples from seven cooling units were pre-selected for paleointensity experiments based on their low viscosity ...
J. Urrutia-Fucugauchi +5 more
doaj
Geochemistry, Geophysics, Geosystems, 2014 Information on the strength of the geomagnetic field is important for understanding the behavior of the geodynamo. Polarity reversal frequency increases toward the late Cenozoic since the end of the Cretaceous Normal Superchron.
Toshitsugu Yamazaki, Yuhji Yamamoto
doaj +1 more source
A New View of Long-Term Geomagnetic Field Secular Variation
Frontiers in Earth Science, 2018 This study carries out a statistical analysis of high-resolution PSV records for the last ~70 ka from three different regions of the Earth. We consider directional and intensity variability in each region on time scales of 103-105 years in order to ...
Steve P. Lund
doaj +1 more source
, 2002 Piston core LC07, located west of the Sicily Strait in the Mediterranean Sea, unambiguously records the Matuyama/ Brunhes (M/B) and the upper Jaramillo polarity reversals, with similar average sediment accumulation rates (SARs) for the Brunhes Chron (2.
Roberts, A. P. +3 more
core +2 more sources
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
openaire +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.Abstract The Ediacaran–Cambrian (∼635–539 Ma) geomagnetic field is characterized by unusually high reversal rates and markedly weakened field strength. Estimates of these reversal frequencies can reveal key aspects of deep Earth dynamics and their potential influence on surface environments and early complex life.
J. W. L. Afonso +12 more
wiley +1 more source
Paleointensity of sediment core PS1707-2
, 1997 Paleointensity of sediment core PS1707-
Norbert R Nowaczyk (6959615) +1 more
core +1 more source
Testing the Accuracy of Paleointensity Estimates Using Experimental Pottery Assemblages
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.Abstract Paleointensity estimates from archaeological pottery represent a key source of information on Holocene variations in geomagnetic field intensity. Yet, pottery rarely exhibits ideal single‐domain behavior that fully satisfies the theoretical assumptions underlying absolute paleointensity methods.
Lior Bar‐Sovik +5 more
wiley +1 more source
Paleointensity of sediment core PS1892-3
, 1997 Paleointensity of sediment core PS1892-
Norbert R Nowaczyk (6959615) +1 more
core +1 more source