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Grain-size records of the terrigenous and calcareous silt fraction, preservation of planktic foraminifera, and benthic foraminiferal stable-isotope data (δ 13 C, δ 18 O values of C. wuellerstorfi) at ODP Site 927 on the Ceará Rise (5°27.7′N, 44°28.8′W), are used to reconstruct variations in the history of bottom current strength, ventilation, and carbonate corrosiveness of deep waters...
Records of mean sortable silt and planktonic foraminiferal preservation from the Ceará Rise (western equatorial Atlantic) and from the Caribbean are presented to analyze the Pliocene (3.5–2.2 Ma) to Pleistocene (1.6–0.3 Ma) evolution of near-bottom current strength and the carbonate corrosiveness of deep water. During the mid-Pleistocene climate transition (∼1 Ma) a drastic decrease in glacial bottom...
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