Table T2. Sediment textures, compositions, and lithology names determined by smear slide, Site U1388.
|
Texture (%) | Composition (%) |
Comments
|
Also reported
|
|||||
---|---|---|---|---|---|---|---|---|---|
Sand
|
Silt
|
Clay
|
Siliciclastic
|
Detrital
carbonate |
Biogenic
carbonate |
Biogenic
silica |
|||
Sand (with biogenic carbonate) |
75–95 | 1–15 | 0–10 | 60–95 | 2–30 | 0–30 | 0–2 |
Subangular to well rounded quartz, felspars, mica, rock fragments, zircon, opaques, heavy minerals, glauconite, foraminifers, and sometimes many pyrite nodules |
|
Silty sand with biogenic carbonate (calcareous silty sand) |
40–70 | 20–40 | 10–20 | 30–60 | 30–50 | 5–20 | 0–2 |
Quartz, opaques, feldspars, mica, zircon, detrital dolomite, hornblende, glauconite, nannofossils, foraminifers, and calcareous and sponge spicules |
|
Sandy silt with biogenic carbonate (calcareous sandy silt) |
20–40 | 45–60 | 15–20 | 45–60 | 20–35 | 20 | 0–4 |
Quartz, mica, opaques, feldspars, glauconite, pyrite, detrital
and authigenic dolomite, nannofossils, foraminifers, and sponge and calcareous spicules |
|
Silty mud with biogenic carbonate (calcareous silty mud) |
5–20 | 35–70 | 30–40 | 25–50 | 25–55 | 20–35 | 0–4 |
Opaques, mica, feldspars, heavy minerals, zircon, glauconite, detrital and authigenic dolomite, pyrite, nannofossils, foraminifers, and calcareous and sponge spicules |
U1388C-3R-2, 25 cm; diatoms and radiolarians |
Mud with biogenic carbonate |
0–10 | 20–40 | 55–80 | 20–60 | 25–55 | 15–25 | 0–2 |
Mica, zircon, glauconite, opaques, heavy minerals, detrital and authigenic dolomite, nannofossils, and sponge spicule fragments |
U1388B-19X-1, 9 cm; diatom and radiolarian fragments |
Nannofossil mud (mud with nannofossils) |
0–5 | 20–30 | 70–80 | 35–55 | 30–40 | 15–25 | Pyrite, nannofossils, and calcareous and sponge spicules |
U1388B-24X-5, 138 cm; wood fragments |
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