Abstract
A novel determination of the absolute paleointensity (P.I) of 28 flows that recorded Cryptochron C2r.2r-1 (ca. 2.46 ± 0.13 Ma) using the modified Thellier-Coe method was undertaken to understand the geomagnetic evolution of the paleofield during an excursion with the existence of less than 10 Kyrs. The successful PI determinations along the 120-meter sequential erupted flows indicate that within the truly transitional/excursional portion of the record there is a conspicuous decrease of the PI values ranging from 20 μT to low values of about 5 μT. These values are comparable to lows similar to polarity transitions of the geomagnetic field. At the base of the sequence, the record shows oscillations of the paleofied ranging from 120 μT and as low as ~10 μT with very variable changes of the non-transitional/excursional paleofield.
Highlights
The study of the short-term behavior of the geomagnetic field is still one of the most relevant and important topics in geophysics today
A brief summary of the results indicates that the Halawa Valley is one of the very few sites characterized by a normal polarity
The determination of the absolute paleointensity of the geomagnetic field from the 28 flows recorded at the Halawa valley volcanic sequence was achieved by using the modified Thellier-Coe protocol, (Coe, 1967) of the Thellier and Thellier-experiments but with a different protocol
Summary
The study of the short-term behavior of the geomagnetic field is still one of the most relevant and important topics in geophysics today. The mechanisms by which the geomagnetic field is generated in the liquid outer core of the planet is crucial to understand the composite spectrum for the geomagnetic diploe moment and the amplitude spectrum of geomagnetic variation as a function of fre-
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
