Study of Declination, Inclination and Absolute Paleointensity of the Short-Term Geomagnetic Behavior (i.e. Cryptochron C2r.2r-1, ca. 2.46 ± 0.13 Ma) Recorded at the Type Section of Halawa Valley, Koo’lau Volcano, Oahu, Hawaii, USA ()
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.
Share and Cite:
Herrero-Bervera, E. (2021) Study of Declination, Inclination and Absolute Paleointensity of the Short-Term Geomagnetic Behavior (i.e. Cryptochron C2r.2r-1, ca. 2.46 ± 0.13 Ma) Recorded at the Type Section of Halawa Valley, Koo’lau Volcano, Oahu, Hawaii, USA.
Journal of Geoscience and Environment Protection,
9, 211-224. doi:
10.4236/gep.2021.912013.