Identification of the Matuyama-Brunhes boundary by paleomagnetic studies of the Roxolany profile (Western Black Sea region)

Magnetostratigraphy and magnetic susceptibility of the best developed Pleistocene loess-palaeosol sequences of Ukraine: implications for correlation and proposed chronostratigraphic models

“…Our ini tial palaeomagnetic stud ies of the Roksolany pro file (Bakhmutov and Hlavatskyi, 2014;Bakhmutov et al, 2017;Hlavatskyi and Bakhmutov, 2019) re vealed that the MBB is located at a depth of 46.6 m be tween two soils, which were clas sified by Gozhik et al (2000Gozhik et al ( , 2007 and Bogucki et al (2013) as the Lubny (lb, and units. A nar row zone of re versed po lar ity was also es tab lished at 42.0-42.5 m depth in the up per most part of the Zavadivka soil (zv; Fig.…”

“…The ini tial data from the Roksolany sec tion (Tretyak, 1980) was aban doned by Heller et al (1996) and re vised re cently by Bakhmutov and Hlavatskyi (2014). Ex pected po si tion of the MBB in the Vyazivok sec tion (Veklich et al, 1984b) was re fined by Vigilyanskaya (2001) and supported later by Hlavatskyi et al (2016b).…”

“…An ini tial magnetostratigraphic in ter pre ta tion of the Roksolany sec tion was pro vided by Bakhmutov and Hlavatskyi (2014), Bakhmutov et al (2017) and Hlavatskyi and Bakhmutov (2019). In this study, we have adopted the palaeomagnetic inter pre ta tion of Bakhmutov et al (2017), Hlavatskyi and Bakhmutov (2019) for 115 spec i mens be low 35 m depth, and add new re sults for 82 spec i mens from the low er most part of the pro file.…”

“…The Martonosha unit was moved up to the place of the Lubny soil (R-S7), and the Lubny unit was moved up wards into the place of the lower Zavadivka soil (R-S6S2), so the Zavadivka unit was re duced. The MBB cited from Bakhmutov and Hlavatskyi (2014) was placed in the up per part of the re lo cated Martonosha (for mer Lubny) unit cor re lat ing with MIS 17-19 (instead of MIS 13-15), with out any de tailed ex pla na tion for the rea son of the change. As stated be fore in Bakhmutov and Hlavatskyi (2014) and Bakhmutov et al (2017), the MBB has been de fined at the con tact of two soil units -the Lubny and Martonosha ac cord ing to the stra tig ra phy of Gozhik et al (2000Gozhik et al ( , 2007 and Bogucki et al (2013).…”

“…The MBB cited from Bakhmutov and Hlavatskyi (2014) was placed in the up per part of the re lo cated Martonosha (for mer Lubny) unit cor re lat ing with MIS 17-19 (instead of MIS 13-15), with out any de tailed ex pla na tion for the rea son of the change. As stated be fore in Bakhmutov and Hlavatskyi (2014) and Bakhmutov et al (2017), the MBB has been de fined at the con tact of two soil units -the Lubny and Martonosha ac cord ing to the stra tig ra phy of Gozhik et al (2000Gozhik et al ( , 2007 and Bogucki et al (2013). The lower soil unit is char ac terized by in di vid ual lithopedological prop er ties and oc cu pies a def i nite strati graphic po si tion in the Roksolany sec tion (Gozhik, 1976;Tretyak, 1980Tretyak, , 1983Gozhik et al, 1995Gozhik et al, , 2000Gozhik et al, , 2007Bogucki et al, 2013;Bakhmutov and Hlavatskyi, 2014;Bakhmutov et al, 2017).…”