Table 1 
Summary of Sedimentation Rates 
Pre-settlement rates are based on carbon-14 dated sediment. 
Post-settlement rates are average rates calculated between a 
maximum of five pollen horizons. The pollen horizons represent 
historically documented changes in the regional vegetation and 
include initial land clearance, shift to intensive agriculture, 
beginning of the chestnut blight, demise of chestnut, and the 
beginning of large-scale urbanization. (Brush, unpublished). 
x n s 
X 
Pre-European 
0.14 
9 
0.05 
Post-European 
0.30 
53 
0.19 
<20% Land Cleared 
Upstream 
0.15 
6 
0.20 
Midstream 
0.24 
5 
0.20 
Downstream 
1.17 
3 
0.06 
40-50% Land Cleared 
Upstream 
0.39 
15 
0.22 
Midstream 
0.37 
16 
0.19 
Downstream 
0.17 
8 
0.13 
25 
