Table S1.

Chronostratigraphic data used to establish the age model for AND-2A presented in this paper (Fig. S1)

DepthEventDescriptionTypeAge (Ma)Ref.
214.13U-4Base cycle 62Unconformity∼14.4–∼9.7 (up to 4.7 My missing)
230.25ANitzschia sp. 17LAD13.7–14.94(56)
237.03BActinocyclus ingens var. nodusFAD14.42–14.57(56)
253.92CLower C5ADnNormal polarity<14.581(46)
255.2DActinocyclus ingensFAD15.05–15.96(56)
262.57U-3Base cycle 60Unconformity15.8–14.6 (∼1.2 My missing)
263EAbsence of A. ingensFAD>15.96(56)
298.34FC5Br/C5Cn.1n (?)MPR15.974(46)
328.52GC5Cn.1nNormal polarity>15.974(46)
358.11HLava clast (Diamictite)40Ar/39Ar date15.91 ± 0.29(55)
366.8IAdamusium shell87Sr/86Sr date16.05 ± 0.35(54)
412.71JC5Cn.1n/C5Cn.1rMPR16.268(46)
429.56KC5Cn.1r/C5Cn.2n (?)MPR16.303(46)
434.35LDenticulopsis maccollumiiFAD16.23–17.03(56)
434.35MNitschia sp. 17FAD16.77–17.94(56)
439.23NC5Cn.2n/C5Cn.2r (?)MPR16.472(46)
440.83OLava clast (Mudstone)40Ar/39Ar date16.54 ± 0.43(55)
448.59PC5Cn.2r/C5Cn.3nMPR16.543(46)
482.69QC5Cn.3n/C5Cr (?)MPR16.721(46)
564.92RLava clast (Conglomerate)40Ar/39Ar date17.1 ± 0.31(55)
581.34SC5Cr/C5DnMPR17.235(46)
640.13TPumice (Lapilli tuff)40Ar/39Ar date17.5 ± 0.14(55)
709.14UPumice (Tuffaceous sst)40Ar/39Ar date18.26 ± 0.21(55)
709.17VPumice (Tuffaceous sst)40Ar/39Ar date18.04 ± 0.31(55)
722.45WC5Dn/C5Dr.1rMPR17.533(46)
736.2XThalassiosira praefragaLAD17.94–17.95(56)
749.4YC5Dr.1r/C5Dr.1nMPR17.717(46)
759.25ZC5Dr.1n/C5Dr.2rMPR17.74(46)
763.84AAThalassiosira nanseniiLAD17.5
771.5ABThalassiosira praefragaFAD18.46–18.58(56)
774.94U-2Base cycle 22Unconformity18.7–17.8 (∼900 ky missing)
783.69ACC5Er/C6nMPR18.748(46)
831.66ADPumice (Tuffaceous zst)40Ar/39Ar date18.82 ± 0.15(55)
953.28AEPumice (Tuffaceous sst)40Ar/39Ar date19.56 ± 0.12(55)
953.94AFPumice (Tuffaceous sst)40Ar/39Ar date19.61 ± 0.17(55)
958.59AGC6n/C6rMPR19.722(46)
965.43U-1Base of cycle 14Unconformity20–19.8 (∼200 ky missing)
986.94AHC6r/C6An.1nMPR20.04(46)
1,093AIPumice (Tuffaceous sst)40Ar/39Ar date20.13 ± 0.15(55)
1,138.54AJC6An.1nnormal polarity<20.213(46)