Open-File Report 2006–1350
U.S. GEOLOGICAL SURVEY
Open-File Report 2006–1350
Table 2. Components of composite samples, types of replicate samples, and physical characteristics of sediments.
[Replicate solid samples were either collected from sections (S) at the given depths or from the centrifuged sediments after extraction of porewaters (PW) with a PW designation letters A through F; multiple letter indicates compositing of samples from multiple cores (see tables 11-16. Abbreviations: LOI, loss on ignition; AVS, acid volatile sulfide; mmol/g, micromole per gram; cm, centimeter; –, not applicable; ND, not determined]
Site identifier |
Sample type | Components of composite sample | Replicate solid samples |
Physical characteristics (in percent) | Comments | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Number of cores | Average length of core (cm) | Sand | Silt | Clay | Moisture | LOI | AVS (µmol/g) | ||||
LR-1 | Composite | 18 | 4 | PW = B,C | 82.0 | 14.6 | 3.4 | 27.2 | 0.70 | 0.04 | Biofilm on top of coarse gravels. |
LR-2 | Composite | 7 | 10 | S = 0–1, 7–10 | 33.8 | 39.1 | 27.1 | 72.6 | 5.80 | 3.07 | |
LR-3 | Composite | 12 | 6 | S = 0–1, 5–6 | 6.9 | 38.8 | 54.4 | 55.5 | 3.90 | .55 | |
LR-4 | Composite | 14 | 4 | PW = A,F | 79.6 | 13.0 | 7.3 | 27.0 | .50 | .005 | Biofilm over fine sand. |
LR-4A | Incubation core | – | – | 1.3 | 63.9 | 38.8 | 75.5 | 5.57 | ND | ||
LR-5 | Composite | 15 | 4 | PW = B,D | 43.0 | 13.5 | 43.5 | 52.0 | 3.40 | 1.43 | |
LR-5A | Incubation core | – | – | 50.6 | 40.9 | 8.5 | 60.3 | 3.47 | ND | ||
LR-6 | Composite | 6 | 4 | S = 0–1, 3–4 | 81.7 | 13.1 | 5.2 | 54.7 | 3.10 | 7.43 | |
LR-7 | Composite1 | 10 | 4 | PW = E,F | 90.7 | 9.3 | .0 | 26.3 | .60 | 10.9 | Coarse material. |
SA-8 | Composite | 12 | 6 | S = 0–1, 5–7 | 24.0 | 32.4 | 43.6 | 48.4 | 4.10 | .40 |
1Replicate sample LR-7-R also collected.