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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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