New Zealand Journal of Geology and Geophysics abstracts
Permian fusulinid Foraminifera from Wherowhero Point, Orua Bay, Northland, New
Zealand
E. JA. LEVEN
Geological Institute
Russian Academy of Sciences
Pyzhevskyi 7
109017 Moscow, Russia
J. A. GRANT-MACKIE
Department of Geology
The University of Auckland
Private Bag 92 019
Auckland, New Zealand
Abstract A new thin-section study of limestones from
Wherowhero Point, Orua Bay, Northland, has produced a fauna of 24 fusuline taxa
and 19 smaller foraminifers. The fusulines are much more diverse than earlier
records have shown and include genera and species not previously recorded
(e.g., Pseudokahlerina compressa Sosnina, Reichelina cf.
lamarensis Skinner & Wilde, Rauserella cf. breviscula
Sosnina, Chusenella urulungensis Wang et al., Yabeina ampla
Skinner & Wilde, Dunbarula, and Pseudofusulina). A
species previously recorded as Yabeina parvula Skinner & Wilde is
re-identified as Y. globosa (Yabe), and that identified earlier as
Lepidolina multiseptata (Deprat) is determined to be its evolutionary
precursor L. shiraiwensis Ozawa. The latter species, together with
Kahlerina pachytheca Kochansky-Devidé & Ramovs,
Neoschwagerina margaritae Deprat, and Yabeina archaica Dutkevich,
are the most widespread species in the eight collections studied from four
localities, and these four species and Yabeina ampla are the most
abundantly represented.
The fauna clearly belongs to the Yabeina-Lepidolina fusulinid zone, and
to the Late Permian Midian Stage, and the presence of Neoschwagerina
margaritae and Yabeina archaica indicates that some samples are
probably Early Midian. A Midian age is also supported by the smaller
foraminifers Frondina permica Civrieux & Sessauvagie,
Robuloides cf. lens Reichel, Dagmarita,
Hemigordiopsis, and Neoendothyra. Paleogeographic relationships
lie with eastern Asia and less strongly also with western North America.
Keywords Waipapa Group; Northland; fusuline foraminifers;
Permian; Midian Stage; Yabeina-Lepidolina Zone; Tethys;
paleobiogeography
New Zealand Journal of Geology and Geophysics, 1997, Vol. 40: 473-486
0028-8306/97/4004-0473 $7.00/0 (c) The Royal Society of New Zealand
1997
PDF file of entire paper: medium quality (4788K); (scanned from paper original: notes about this process)
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