Publication Date:
2024-06-26
Description:
The thermal structure of the Pacific Ocean between water depths of about 1 and 4.5 kilometers is estimated from the oxygen isotopic ratio of benthonic foraminifera from deep-drilled and piston cores of early Pliocene age (about 3 to 5 million years ago). The ratio of oxygen-18 to oxygen-16 in the early Pliocene at each site varies by an average of only ± 0.12 per mil (1 standard deviation). A plot of the oxygen isotopic ratio against modern bottom-water temperature is adequately fit by a line having a slope of - 0.26 per mil per degree Celsius (the equilibrium temperature dependence of calcite-water fractionation), suggesting that the temperature gradient of the Pacific Ocean during the early Pliocene was similar to that of today.
Keywords:
16-158; 21-206; 21-207A; 21-208; 29-284; 29-284A; 32-310; 7-62A; 9-84; Antarctic Ocean/Tasman Sea/PLATEAU; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Globocassidulina subglobosa, δ18O; Glomar Challenger; Leg16; Leg21; Leg29; Leg32; Leg7; Leg9; North Pacific; North Pacific/CONT RISE; North Pacific/RIDGE; Oridorsalis sp., δ18O; PC; Piston corer; Sample code/label; South Pacific/Tasman Sea/BASIN; South Pacific/Tasman Sea/CONT RISE; Uvigerina sp., δ18O; V28; V28-179; Vema
Type:
Dataset
Format:
text/tab-separated-values, 222 data points
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