Globorotalia (planktic Foraminiferida) in the late Pliocene and early Pleistocene of New Zealand

Author(s): Hornibrook, N. de B.
Author Affiliation(s): Primary:
New Zealand Geol. Surv., Lower Hutt, New Zealand
Volume Title: New Zealand Journal of Geology and Geophysics
Source: New Zealand Journal of Geology and Geophysics, 24(2), p.263-292. Publisher: Department of Scientific and Industrial Research (DSIR), Wellington, New Zealand. ISSN: 0028-8306 CODEN: NEZOAY
Note: In English. 3 p. refs.; illus. incl. sketch map
Summary: In the East Coast Basin, Globorotalia crassaformis coils predominantly sinistrally in the Opoitian and Waipipian Stages (Early to Late Pliocene), dextrally in the Mangapanian and lower Nukumaruan (Late Pliocene and Early Pleistocene), and sinistrally in the upper Nukumaruan (Pleistocene). Globorotalia crassula appears as an immigrant, approximately at the base of the Nukumaruan, at about the same level as the earliest appearance of the subantarctic mollusc Chlamys delicatula, and overlaps with the range of dextrally coiling G. crassaformis in the lower Nukumaruan. Globorotalia tosaensis and small morphotypes of G. truncatulinoides appear in the Mangapanian, becoming replaced gradually by more typical G. truncatulinoides in the Nukumaruan. One new species, Globorotalia crassaconica (Opoitian-Waipipian), and 1 new subspecies, G. puncticulata puncticuloides (Mangapanian-Nukumaruan), are described. DSDP Site 284, 400 km west of New Zealand, has a similar sequence of planktic foraminifera and the Globorotalia crassula to dextral G. crassaformis overlap-zone is between 50 and 60 m subbottom, in an interval with a marked enrichment of 18O. In the paleomagnetically zoned Mangaopari Stream section, G. crassula and Chlamys delicatula first appear between the Gauss normal polarity zone and the Olduvai normal polarity subzone.
Year of Publication: 1981
Research Program: DSDP Deep Sea Drilling Project
Key Words: 10 Paleontology, Invertebrate; 24 Surficial Geology, Quaternary Geology; Australasia; Biostratigraphy; Cenozoic; East Coast Basin; Foraminifera; Globigerinacea; Globorotalia; Globorotalia crassaconica; Globorotalia crassaformis; Globorotalia crassula; Globorotalia tosaensis; Globorotalia truncatrilinoides; Globorotaliidae; Invertebrata; Lower Pleistocene; Microfossils; Neogene; New Zealand; New taxa; North Island; Planktonic taxa; Pleistocene; Pliocene; Protista; Quaternary; Rotaliina; SEM data; Stratigraphic boundary; Stratigraphy; Tertiary; Upper Pliocene
Record ID: 1983053773
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique, Vandoeuvre-les-Nancy, France

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