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 surface microlayer (» 2mm) enriched    mixed layer (0 - 300m) relatively well mixed   thermocline (300 - 500m)  steadily ¯ T     deep layer (0.5- 11km)  1-2oC, poorly mixed
1.2micro filter
Na+ 41.9%  Mg2+ 4.7% K+ 0.9% Ca2+ 0.9%
Cl-  49.0%  SO42- 2.5%              HCO3- 0.2%
H2 and pyrites are also produced.
Basalt is ?
S2O3 = thiosulfate