publications > open file report > OFR 2004-1448 > appendixes > Appendix C
Average Sediment Accumulation Rate (2-8cm) = 1.65 cm/yr Average Sediment Accumulation Rate (8-20cm) = 0.27 cm/yr
Appendix C. Lead-210 for 00-8-10-13.
Core Location: 00-8-10-13
Core ID
Depth (cm)
Mean Depth (cm)
Total Pb-210 Activity (dpm/g)
Total Pb-210 Activity Error (+/-)
Cs-137 Activity (dpm/g)
Cs-137 Activity +/- (dpm/g)
Ra-226 Activity (dpm/g)
Ra-226 Activity +/- (dpm/g)
K-40 Activity (dpm/g)
K-40 Activity +/- (dpm/g)
Excess Pb-210 Activity (dpm/g)
Ln Excess Pb-210 Activity (dpm/g)
‡‡Calc. Ln Excess Pb-210 Activity (dpm/g)
‡‡Calc. Excess Pb-210 Activity (dpm/g)
†Calc. Excess Pb-210 Activity (dpm/g)
00-08-10-13
0-1
0.5
14.51
0.285
0.21
0.13
0.95
0.24
Tr
--
13.55
2.61
--
--
--
00-08-10-13
1-2
1.5
16.81
0.306
--
--
--
--
--
--
15.95
2.77
2.81
16.68
--
00-08-10-13
2-3
2.5
17.61
0.385
--
--
--
--
--
--
16.75
2.82
2.80
16.37
--
00-08-10-13
3-4
3.5
16.67
0.393
0.40
0.09
0.77
0.15
6.88
0.83
15.90
2.77
2.78
16.06
--
00-08-10-13
4-5
4.5
17.30
0.448
0.46
0.07
0.65
0.11
3.98
0.59
16.65
2.81
2.76
15.76
--
00-08-10-13
5-6
5.5
16.52
0.423
0.55
0.07
0.73
0.12
5.04
0.64
15.78
2.76
2.74
15.46
--
00-08-10-13
6-7
6.5
15.61
0.318
0.69
0.09
0.63
0.14
4.56
0.74
14.98
2.71
2.72
15.18
--
00-08-10-13
7-8
7.5
14.88
0.495
0.88
0.08
0.45
0.10
4.20
0.60
14.44
2.67
2.70
14.89
--
00-08-10-13
8-9
8.5
15.77
0.422
1.06
0.12
0.43
0.14
Tr
--
15.34
2.73
--
--
15.78
00-08-10-13
9-10
9.5
14.30
0.948
1.21
0.10
0.53
0.12
4.11
0.61
13.77
2.62
--
--
14.08
00-08-10-13
10-11
10.5
12.21
0.398
1.28
0.11
0.54
0.14
2.13
0.60
11.68
2.46
--
--
12.57
00-08-10-13
11-12
11.5
13.21
0.381
1.07
0.07
0.84
0.10
3.27
0.47
12.38
2.52
--
--
11.21
00-08-10-13
12-13
12.5
10.62
0.481
0.96
0.09
0.57
0.12
3.46
0.60
10.05
2.31
--
--
10.01
00-08-10-13
13-14
13.5
10.55
0.406
0.81
0.08
0.51
0.10
2.64
0.48
10.04
2.31
--
--
8.93
00-08-10-13
14-15
14.5
10.13
0.404
0.80
0.09
0.51
0.14
2.35
0.64
9.62
2.26
--
--
7.97
00-08-10-13
15-16
15.5
7.64
0.287
0.65
0.06
0.56
0.10
2.31
0.42
7.08
1.96
--
--
7.11
00-08-10-13
16-17
16.5
7.05
0.248
0.57
0.09
0.60
0.14
2.04
0.59
6.46
1.87
--
--
6.35
00-08-10-13
17-18
17.5
5.62
0.163
0.52
0.08
0.61
0.12
2.35
0.56
5.02
1.61
--
--
5.67
00-08-10-13
18-19
18.5
4.53
0.165
0.61
0.06
0.63
0.10
2.29
0.43
3.90
1.36
--
--
5.06
00-08-10-13
19-20
19.5
4.19
0.144
0.62
0.06
0.78
0.11
2.07
0.45
3.41
1.23
--
--
4.51
ND = Not detected
Tr = Trace quantity, too low to quantify
Linear best fit of Ln excess Pb-210 activity (2-8cm).
‡‡Calc. Ln Excess = (-0.01889 * z) + 2.8425 r2 = 0.76
Single decay best fit curve of excess Pb-210 activity (8-20cm).
†Calc. Excess = 11.3333 * exp((11.4077 - z) / 8.7877) r2 = 0.94
U.S. Department of the Interior, U.S. Geological Survey
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Last updated: 30 March, 2005 @ 03:17 PM (KP)