Conventional sub-sampling

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Sub-sampling from laminated sediment:

Because…

31 Dec. 24:00 pmspringautumn

31 Dec. 24:00 pm

01 Jan.00:00 am

01 Jan. 00:00 am

Impossible Possible!!

Parallel cutting produces seasonally-biased sub-samples unless you make this perfect cutting (which is not possible).

Diagonal cutting (which is possible) is almost equivalent to the perfect cutting in terms of representation of seasons.

SG06 sub-sampling-1

Splitting core into bars by LL-channel,

SG06 sub-sampling-2

then slicing bars diagonally by centi-slicer.