TABLE 1.
Site | Date (age [yr])b | Water contents (%)c | Bulk density (gdw cm−3) | pH | % of:
|
Concn (nmol gdw of material−1) of:
|
||
---|---|---|---|---|---|---|---|---|
C | N | NO3− | PO43− | |||||
I-A | 1982 (18) | 0.1-2 | NDetd | NDet | 0.02 ± 0.01 | NDe | 15 ± 10 | ND |
I-B | 1974 (26) | 4-6 | NDet | NDet | 0.05 ± 0.01 | ND | 7 ± 1 | 3 ± 2 |
I-C | 1921 (79) | 11-21 | 0.87 | 3.9 ± 0.1 | 0.05 ± 0.01 | ND | 7 ± 0.4 | ND |
I-D | 1894 (106) | 12-16 | 1.71 | 4.4 ± 0.03 | 0.15 ± 0.03 | ND | 10 ± 2 | 13 ± 0.2 |
I-E | 1790 (210) | 11-17 | 1.43 | 4.6 ± 0.03 | 0.7 ± 0.1 | 0.02 ± 0.01 | 7 ± 0.4 | 2 ± 1 |
II-A | 1969 (31) | 5-7 | 0.65 | 5.4 ± 0.2 | 0.2 ± 0.1 | ND | 3 ± 1 | 10 ± 5 |
II-B | 1959 (41) | 17-24 | 0.57 | 5.3 ± 0.1 | 0.5 ± 0.1 | ND | 4 ± 1 | 34 ± 2 |
II-C | 1700 (300) | 51-114 | 0.79 | 5.7 ± 0.03 | 20.4 ± 1.1 | 1.1 ± 0.1 | 779 ± 213 | 166 ± 75 |
Data for all parameters but bulk density represent means of triplicate determinations ± 1 standard error.
Dates represent known or estimated primary deposition dates of material at each site, and ages are those for sample collection during the year 2000.
Shown is the percentage of water content (grams of water per gram [dry weight] of material).
NDet, not determined.
ND, not detected.