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Now pierce holes in the polystyrene ball using an apple corer.
A Russian corer can be used to extract a 2m peat core in 50cm sections.
Therefore, we are using the box corer, which allows us to recover undisturbed surface sediments from the seafloor.
Onboard the RRS James Clark Ross is the BGS 6 m gravity corer.
Richie, on board to run the piston corer, removing a mud core from the barrel.