Constraining the timing of palaeosol development in Iranian arid environments using OSL dating

Abstract

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Late Pleistocene–Holocene pedogenesis and palaeoclimate in western Asia from palaeosols of the Central Iranian Plateau

“…The 5Btkb palaeosol of this pedon presumably developed at the same time as that found in the upper unit at Isfahan (deposition at 40AE8 ka). The deposition of the parent material of the uppermost palaeosols unit at Isfahan, Lar (deposition at 43AE8 ka) and the middle Btk horizon at Mahan (deposition at 54AE4 ka) are roughly coincident with MIS 3 (Rashidi et al 2019).…”

“…The final pedogenesis at the top of this section after 40AE8 ka (2Btkb) presumably corresponds to the bottom palaeosols (5Btkb) at the Bajestan section (deposition at 35AE7 ka). The timing of parent material sedimentation of the upper 2Btkb horizon of Isfahan with an age of 40AE8 ka is most likely in temporal coincidence with the Bk (43AE5 ka) and Bt (54AE4 ka) horizons of Lar (Fars Province) and Mahan sections (Kerman Province) in the south and southeast of the Iranian Plateau, respectively (Rashidi et al 2019).…”

“…There are several studies that report the development of the argillic horizons during MIS 5 in the Iranian Plateau (Kehl 2009;Karimi et al 2011;Khormali & Kehl 2011;Vlaminck et al 2018;Rashidi et al 2019). But Rashidi et al (2019) reported that the argillic horizons were also developed in MIS 3 and the Holocene.…”

“…In a recent study, a chronological constraint on the palaeosols in the dry zones of the Central Iranian Plateau was established, for the first time, using luminescence dating (Rashidi et al 2019). This study provided evidence for the formation of palaeosol during MIS 5, MIS 3 and MIS 1, while pedogenesis does not appear to have taken place during MIS 2 and MIS 4.…”

Pulvar River changes in the Pasargadae plain (Fars, Iran) during the Holocene and the consequences for water management in the first millennium BCE

“…We thus concentrated on dating techniques via luminescence (OSL: post-IR IRSL). The OSL technique has been applied for more than 20 years in Iran for geomorphological studies, for example on the formations of loess in the country's north (Thomas et al, 1997;Wei et al, 2021), as well as on Zagros alluvial formations (Kehl et al, 2009;Rashidi et al, 2019). For deposits in archaeological contexts, it has been applied in different spatio-temporal contexts, for dating canals (Berger et al, 2009;Huckleberry et al, 2012) and sedimentary accumulations upstream from dams (Aiuvalasit et al, 2010).…”