Weathering rind age assignment of neoglacial deposits in the okstindan mountains, northern Norway

Pre vi ous soil strati graphic anal y sis of soil morphogenesis in the Okstindan Moun tains es tab lished a Late Neoglacial soil evo lu tion ary se quence based on his tor i cally mon i tored and ra dio car bon-dated mo raine po si tions over the last ~3.0 cal yr BP. Thus pedon evo lu tion ranged from C/Cu®Ah/Cox/Cu®pedostratigraphic suc ces sion of Ah/C/Cu/Lb/Cub/Ahb/Coxb/Cub pro files with a max i mum rind weath er ing time of ~1.0 kyr. Fol low ing suc ces sive re treat phases of Neoglacial ice, weath er ing rind de vel op ment con tin ued apace on mo raines, each rind pop u la tion re cord ing weath ering time fol low ing suc ces sive gla cier stillstands. The age of the youn gest de pos its falls within the pe riod 1900–1910 AD, or the last 100 yrs, with vari able mo raine po si tions all doc u mented by his tor i cal de pic tions of the po si tion of the Austre Okstindan gla cial lobe prior re treat ing to its pres ent po si tion. The next older group of de pos its is con sid ered to have been emplaced near the end of the LIA or around ~1800 AD, with time of rind de vel op ment set at 200 yr, pos sibly older. The old est mo raine set within the late Neoglacial se quence lies atop a pedostratigraphic col umn, the up permost soil ra dio car bon dated at ~1.0 yr BP. Given the range of mean rind de vel op ment across this thresh old of de pos its, from 0.22 ±0.03 mm in the in ner group, 0.66 ±0.07mm in the mid dle group, to 1.38 ±0.15 mm in the outer, older group, it is clear that fi nite mea sure ments at sev eral sites within a suite of de pos its, some dated by ra dio car bon, can evenly dis crim i nate be tween de pos its in a gla cial suc ces sion.