APPENDIX

Diatom Accumulation Rate (valves/cm² per k.y.) (e.g. Battarbee, 1986; Schuette and Schrader, 1979):

DAR = DMAR · C_dw

Where:

DMAR = Dry Mass Accumulation Rate (g/cm per k.y.)

C_dw = diatom concentration per gram dry weight (valves/g)

Dry Mass Accumulation Rate (e.g. Battarbee, 1986; Schuette and Schrader, 1979):

DMAR = SR · DBD_sc

Where:

SR = Sedimentation Rate (cm/k.y.) (NB must be calculated for each core section to avoid problems associated with postdrill handling)

DBD_sc = Salt Corrected Dry Bulk Density (g/cm³)

Concentration per gram dry weight (valves/g) (Battarbee and Kneen, 1982; Schuette and Schrader, 1979):

C_dw = C_d/W

Where:

C_d = diatom concentration (number of valves)

W = dry weight processed (g)

Diatom Concentration (by microsphere method) (Battarbee and Kneen, 1982):

C_d = (Y_mi · X_d)/Y_mc

Where:

Y_mi = number of microspheres introduced

X_d = number of diatom valves counted

Y_mc = number of microspheres counted