Authors
Daniele Thallner, Andrew J Biggin, Phil JA McCausland, Roger R Fu
Publication date
2021/9
Journal
Journal of Geophysical Research: Solid Earth
Volume
126
Issue
9
Pages
e2021JB022292
Description
The geomagnetic field in the Ediacaran period appears to be characterized by anomalous directions, high reversal frequencies, and ultra‐low field strength. At the Ediacaran‐Cambrian transition, apparent polar wander paths become less controversial, but hyper‐reversing fields with reversal frequencies similar to earlier in the Ediacaran have been reported until the mid‐Cambrian. To understand the long‐term behavior of the magnetic field during this transitional interval, information about the field strength is vital but currently lacking. To improve the intensity record at that time, samples of volcanic rocks from the 550 Ma Skinner Cove Formation, western Newfoundland, have been used for paleointensity determination. This multi‐method paleointensity study, utilizing thermal and microwave Thellier as well as double‐heating Shaw and pseudo‐Thellier experiments produces paleointensity estimates of 2.6–10.3 μT …
Total citations
20212022202320241974