TABLE 1.
Selected properties of Hawaiian volcanic depositsa
| 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 |
a
Data for all parameters but bulk density represent means of triplicate determinations ± 1 standard error.
b
Dates represent known or estimated primary deposition dates of material at each site, and ages are those for sample collection during the year 2000.
c
Shown is the percentage of water content (grams of water per gram [dry weight] of material).
d
NDet, not determined.
e
ND, not detected.