Abstract:
:The study of geomagnetic excursions is key for understanding the behavior of the magnetic field of the Earth. In this paper, we present the geomagnetic record in a 2.29-m-long continuous core sampled in a flowstone in Liguria (Italy) and dated to the Lower Brunhes. The cored flowstone developed from Marine Isotopic Stage (MIS) 13 to MIS 7, according to 21 U-series dates. The mean growth rate is closely related to glacial and interglacial isotopic stages. Magnetic remanence was measured using u-channel and deconvolved. Four geomagnetic excursions were recorded at the same location, in a single flowstone, during interglacial MIS 11 and 13; Basura 1, 2, 3 and 4, at depths of 213 cm, 181, 160 and 92 cm, respectively. Due to the uncertainties of U-Th dating, the timing of the three events, namely Basura 1, 2 and 3 overlaps. The Basura 4 is well-dated to 417 + -7/8 ka and is clearly distinguishable from the others. It should therefore be considered as a possible excursion.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Pozzi JP,Rousseau L,Falguères C,Mahieux G,Deschamps P,Shao Q,Kachi D,Bahain JJ,Tozzi Cdoi
10.1038/s41598-018-38350-4subject
Has Abstractpub_date
2019-02-04 00:00:00pages
1114issue
1issn
2045-2322pii
10.1038/s41598-018-38350-4journal_volume
9pub_type
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