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GCR Display Cores
Peru Continental Margin
Two processes, plate subduction and coastal upwelling, shaped the Peruvian margin and its sediments since Eocene time. Studies of theses two processes off South America increased our general knowledge of subducting plate boundaries and the dynamics of coastal upwelling.
Diatomaceous mud finely laminated with thin graded base, slump folds, convolute laminations, microfaults, and dewatering veins.
Quaternary (based on volcanic ash layer)
Depositional Environment Interpretation
Sediments deposited in middle to upper-bathyal environments, perhaps a slope
depths comparable to the present depth of site 686 (205.7 mbsf). Higher energy,
more-oxygenated environments having substantial terrestrial influx and enhanced
sediment reworking relative to units I, III and V.
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Modified on Friday, 26-Sep-2008 12:39:11 CDT.