I have done calculations on rates of sedimentation using a most 'primitive' system: estimating load quantity of all of the suppliers, learning the spread of those loads in the ocean, finding out what's the addition of local carbonate deposition, and finding out whether there is some addition from atmospheric dust. Seems to be complicated, but was later compared to other methods and showed to be a most accurate way. HARD WORK - but good results!

Dr.  Yaacov Nir