Sieving and drying the sediment core
This protocol is extracted from research article:
Multidecadal increase in plastic particles in coastal ocean sediments
Sci Adv, Sep 4, 2019; DOI: 10.1126/sciadv.aax0587

The 76-cm subcore was cut transversely every 0.5 cm with very fine wire, and the location of each cut was recorded. Then, sediment samples were stored frozen before further processing. Transverse samples were oven-dried overnight at 50°C, washed, and then wet-sieved in metal sieves using a 104-μm mesh over a 65-μm mesh. The >104-μm fraction was first sorted under a dissecting microscope by W.J. for fish otoliths before being sorted for microplastics. Core chronology was resolved to the upper and lower edges of the 0.5-cm transverse samples; the dates assigned to the upper and lower edges were averaged and used to assign dates to samples found within the transverse section.

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