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Data concerning preparation of pollen concentrates and graphite targets and results of dating.

Laboratory processing of concentrates was aimed at the removal of non-sporomorph organic matter by means of chemical treatment, micro-sieving and heavy liquid seperation. The optained concentrates were checked under the microscope and sample purity was estimated on the basis of particle counts. The results of AMS 14C dating show differences in the sedimentation rate among three sites of Lake Baikal.

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