Open-File Report 2006–1350

U.S. GEOLOGICAL SURVEY
Open-File Report 2006–1350

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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.

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