Table 3.
Sediment accumulation and carbon accumulation based on 210Pb modeling from sediment cores. In some cases (Portland, Nahant), sedimentation rates could be determined, but uncertainties in the model did not allow a definitive core date to be defined
| Site | Site code | Sediment accumulation rate (g/cm2/year) | Carbon accumulation rate (g C/m2/year) | Core age (year) |
|---|---|---|---|---|
| Portland, ME | PO | 0.16 ± 0.09 | 48 ± 25 | No datac |
| Great Bay, NH | GB | 1.19 ± 0.15 | 230 ± 30 | 18 |
| Gloucester, MA | NB | 0.121 ± 0.008 | 16.7 ± 1.1 | 113 |
| Nahant, MA | PC | 0.29 ± 0.08 | 20 ± 5 | No datac |
| Boston Harbor, MA | BH | No dataa | No dataa | No dataa |
| Cohasset, MA | CT | No dataa | No dataa | No dataa |
| Orleans, MA | PB | 0.27 ± 0.08 | 8 ± 2 | 95 |
| W. Falmouth, MA | WF | No datab | No datab | No datab |
| Prudence Island, RI | PI | 0.14 ± 0.02 | 8.9 ± 1.2 | 113 |
| Martha’s Vineyard, MA | MV | No dataa | No dataa | No dataa |
| Charlestown, RI | NP | 0.26 ± 0.03 | 89 ± 10 | 54 |
a
Signs of disturbance/mixing in profile
b
Sediment accumulation low or negligable
c
Age could not be calculated