Till‐covered sand and silt sediments with organic material from Boliden, northern Sweden, have been resampled and reinvestigated. Texture and petrographic analyses demonstrated one till bed overlying, and one underlying the sandy sediments. Low frequencies of diatoms were noted, representing freshwater, halophilous and brackish water taxa. The diatoms may be allochthonous or autochthonous, or redeposited from older deposits. Pollen analysis revealed a new picture of the composition of the vegetation, as compared with earlier investigations. The flora consisted of an arctic‐subarctic treeless shrub and herb vegetation dominated bySalix, Betula nana, Gramineae and Cyperaceae.Artemisiaand several arctic‐alpine herbs were important elements. The identification ofSalixwood as well as fruits and fruit scales ofBetula nanaandBetulacf.humilisis in agreement with the pollen‐analytical results, as is the occurrence of Nordicboreal species of Coleoptera. Two radiocarbon datings resulted in an age ofc.45,000 B. P. and>40,000 B.P. The Boliden till‐covered sediments were most probably deposited during an Early or Middle Weichselian interstadial, but the initial or final stage of an interglacial (Eemian) is also