New Zealand Journal of Geology and Geophysics abstracts
A new Early Jurassic radiolarian fauna from the Murihiku Supergroup of the
Otago coast, New Zealand
R. S. HORI
Department of Earth Sciences
Ehime University
Bunkyo-cho 2-5
Matsuyama, 790-77, Japan
J. D. CAMPBELL
Geology Department
University of Otago
P.O. Box 56
Dunedin, New Zealand
J. A. GRANT-MACKIE
Geology Department
The University of Auckland
Private Bag 92019
Auckland, New Zealand
Abstract Lower Jurassic Radiolaria are documented from
Aratauran strata of the Murihiku Supergroup at the northern end of Sandy Bay,
south of Nugget Point, Otago, New Zealand. The fossils were extracted from
small carbonate nodules in fine grey sandstone in the middle part of the
Aratauran sequence. The following genera were identified: Eptingium(?),
Gigi, Hsuum, Orbiculiforma, Pantanellium,
Paronaella(?), Poulpus(?), Saitoum,
Spongostaurus(?), and Thetis. Comparison with radiolarian faunas
of Europe, southwest Japan, and North America suggests that the study fauna is
of Pliensbachian age, probably Early Pliensbachian, indicating the possibility
that the Aratauran local stage, previously equated approximately with
Hettangian-Sinemurian internationally, extends into the Early Pliensbachian.
Keywords Lower Jurassic; Radiolaria; Aratauran; Murihiku
Supergroup; Pliensbachian; New Zealand
New Zealand Journal of Geology and Geophysics, 1997, Vol. 40: 397-399
0028-8306/97/4003-0397 $7.00/0 (c) The Royal Society of New Zealand
1997
Short communication
PDF file of entire paper: medium quality (906K); (scanned from paper original: notes about this process)
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