15000
16000
17000
18000
19000
20000
21000
22000
0
1000
2000
3000
4000
5000
6000
7000
100
110
120
130
140
150
Depth (cm)
Depth (cm)
A
15000
15500
16000
16500
17000
17500
18000
18500
0
1000
2000
3000
4000
5000
6000
7000
100
110
120
130
140
150
Radiocarbon age (years BP)
Radiocarbon Age (years BP)
Number of grains per gram of sediment
Number of grains per g of sediment
Initial
h = 15 cm
h = 10 cm
14C ages
Initial
h = 15 cm
h = 10 cm
14C ages
B
Fig. 4.12 Bioturbation effects on
14
C age of an event, observed in a
deep sea sediment core with sedimentation rates of 10 cm/1000 years
(a) and 30 cm/1000 years (b) using bioturbation depth (h) of 10 cm
(black triangles) and 15 cm (black squares). The initial
14
C ages are
plotted by crosses, and the resulting deviations from a bioturbation
depth of 10 cm (white triangles) and 15 cm (white squares). Note the
change of the
14
C age scales in a and b
68
M. Paterne et al.