Table 1.
Reference | Date of sampling | # Unique sites | # Profiles (total depth ≥15 cm)b |
---|---|---|---|
Olafson et al. (1957) | 1948 | 17 | 0 |
Hakonson et al. (1973) | 1972 | 8 | 8 |
Douglas (1978) | 1973, 1974 | 88 | 11 |
Nyhan et al. (1976) | 1976 | 4 | 2 |
Hansen and Rodgers (1985) | 1977 | 54 | 17 |
McArthur and Miller (1989)a | 1982 | 14 | 14 |
aMost of these samples were remote from the areas impacted by Trinity fallout and served as control samples.
bMost of the profile samples were taken in 5 cm increments; of the 38 profile samples, excluding the McArthur and Miller samples, 20 reached to only 15 cm while only 13 extended to ≥25 cm.