Fig. 2.

Naust Formation chronostratigraphy. a. Dip seismic profile GMNR94–106 showing Naust sequences (located in Fig. 1b). N0 represents the basal Naust surface. b. Approximate chronology of the Naust Formation evolution (from Rise et al., 2010) with the δ¹⁸O marine-isotope time series as a global ice volume proxy (from Lisiecki and Raymo, 2005). Major events are annotated to the left: IRD – early Quaternary increase in ice-rafted debris (Jansen and Sjøholm, 1991). MPT – the middle-Pleistocene Transition (~ 1.2–0.75 Ma) (Clark et al., 2006). Modified from Montelli et al. (2017).