| TABLE 3. 137Cs data for bomb-curve analysis of core SB1b, St. Bernard Parish, Louisiana. | |||||||
| St. Bernard core SB1b (location: 29o58"53' N, 89o55"27' W; sampled 03/18/1996). | |||||||
| Percent compaction (applied linearly): 9.7. dpm, disintegrations per minute. | |||||||
|
Sample I.D. |
Corrected depth sample midpoint1 (cm) |
Net weight, air-dried (g) |
Bulk density, air-dried (g cm-3) |
137Cs activity (dpm ± one standard deviation) |
40K activity (dpm ± one standard deviation) |
||
| SB1b-12 | 6.7 | -- | -- | -- | -- | -- | -- |
| SB1b-2 | 9.1 | 8.00 | 0.08 | 0.128 | 0.020 | 0.311 | 0.017 |
| SB1b-3 | 11.4 | 7.40 | 0.07 | 0.145 | 0.017 | 0.268 | 0.014 |
| SB1b-4 | 13.7 | 13.90 | 0.14 | 1.561 | 0.039 | 0.418 | 0.021 |
| SB1b-5 | 16.0 | 13.29 | 0.13 | 2.814 | 0.050 | 0.430 | 0.021 |
| SB1b-6 | 18.4 | 11.53 | 0.12 | 2.137 | 0.082 | 0.332 | 0.036 |
| SB1b-7 | 20.7 | 11.67 | 0.12 | 0.759 | 0.037 | 0.298 | 0.023 |
| SB1b-8 | 23.0 | 11.12 | 0.11 | 0.446 | 0.028 | 0.311 | 0.020 |
| SB1b-9 | 25.3 | 13.06 | 0.13 | 0.302 | 0.024 | 0.446 | 0.020 |
| SB1b-10 | 27.7 | 13.16 | 0.13 | 0.149 | 0.024 | 0.463 | 0.024 |
| SB1b-11 | 30.0 | 12.20 | 0.12 | 0.052 | 0.014 | 0.334 | 0.013 |
| SB1b-12 | 32.3 | 10.98 | 0.11 | 0.072 | 0.022 | 0.294 | 0.019 |
| SB1b-13 | 34.7 | 11.50 | 0.11 | 0.039 | 0.020 | 0.260 | 0.018 |
| SB1b-19 | 48.6 | 11.59 | 0.12 | -0.026 | 0.018 | 0.304 | 0.017 |
| SB1b-25 | 62.6 | 9.61 | 0.10 | 0.013 | 0.019 | 0.206 | 0.018 |
| 1Corrected depth equals original depth (midpoint of sample interval) multiplied by 1.1074 to correct for compaction. | |||||||
| 2Top 2 inches (5.08 cm) discarded in the field. No analysis of sample at corrected depth of 6.7 cm. | |||||||
| Source: U.S. Geological Survey Open-File Report 98-36. Carbon storage and late Holocene chronostratigraphy of a Mississippi River deltaic marsh, St. Bernard Parish, Louisiana (H.W. Markewich, ed.). | |||||||