Ibaraki, Masako (2000): Pliocene-Pleistocene planktonic Foraminifera from the ODP Leg 170 Hole 1039B in the Middle American Trench off Costa Rica. Shizuoka Daigaku Rigakubu, Shizuoka, Japan, Reports of Faculty of Science, Shizuoka University, 34, 37-58, georefid:2000-054086

Abstract:
The drill site of Hole 1039B is located on the bottom of the Middle American Trench off Costa Rica. Biostratigraphic analyses by means of planktonic Foraminifera are made on 148 samples in total from Cores 170-1039B-1H through 18X of about 160 meters in thickness. These sediments are included in Zones N19 through N23, the Pliocene to Pleistocene in age. Occurrences of planktonic Foraminifera are rare in Zones N19 and N21, although those are common in Zones N22 and N23. A temporal decrease of warm-water dwellers is recognized at ca. 4Ma in Zone N19, suggesting an influence of the closing of the Central American Seaway.
Coverage:
West: -86.1200 East: -86.1200 North: 9.3823 South: 9.3823
Relations:
Expedition: 170
Site: 170-1039
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=2000-054086 (c.f. for more detailed metadata)
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