(Table 1) Summary statistics of taxa in samples of ODP Hole 181-1123B ...
Planktonic foraminifera are used to identify late Pliocene-Quaternary near surface water masses on the northeastern flank of Chatham Rise by comparison with faunas in core-tops east of New Zealand. In an overview study, distance measures, ordinations, and discriminant analysis are applied to 32 faun...
| Main Authors: | , |
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| Format: | Dataset |
| Language: | English |
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PANGAEA
2004
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.734647 https://doi.pangaea.de/10.1594/PANGAEA.734647 |
| Summary: | Planktonic foraminifera are used to identify late Pliocene-Quaternary near surface water masses on the northeastern flank of Chatham Rise by comparison with faunas in core-tops east of New Zealand. In an overview study, distance measures, ordinations, and discriminant analysis are applied to 32 faunas from Site 1123B to identify similar faunas among 35 core-tops between 35 and 61°S east of New Zealand. Many Site 1123B faunas in the 2.72 myr interval sampled compare with those in core-tops on the northern side of Chatham Rise from a similar latitude, and are identified as transitional zone assemblages now associated with the subtropical gyre. This result is consistent with studies of late Quaternary planktonic foraminifera from this region and suggests that, typically, the Subtropical Front was locked to Chatham Rise through glacial and interglacial periods, at least back to the late Pliocene. However, a fauna at ca. 1.17 Ma compares with subpolar assemblages in core-tops between 44 and 48°S and identifies ... : Globorotalia inflata includes 19 specimens of Globorotalia puncticuloides and Globorotalia puncticulata? from 4 samples below 8H-5-100. Globorotalia oceanica (no peripheral keel) from 10H-2-100-10H-7-5 is included in Globorotalia crassaformis. Globigerinita glutinata includes Globigerinita juvenilis. Globigerina falconensis includes tentative identifications. Neogloboquadrina dutertrei s.l. comprises forms intermediate between Neogloboquadrina dutertrei and Neogloboquadrina pachyderma; no typical specimens of the former were found. ... |
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