New Zealand Journal of Geology and Geophysics abstracts
Age and provenance of Cretaceous marine reptiles from the South
Island and Chatham Islands, New Zealand
Graeme J. Wilson1
Poul Schiøler2
Norton Hiller3
Craig M. Jones1
1Institute of Geological & Nuclear Sciences
P.O. Box 30 368
Lower Hutt, New Zealand
graeme.wilson@gns.cri.nz
2Geological Survey
of Denmark and Greenland
Ø. Voldgade 10
DK-1350 Copenhagen K, Denmark
3Canterbury
Museum
Rolleston Avenue
Christchurch, New Zealand
and
Department
of Geological Sciences
University of Canterbury
Private Bag 4800
Christchurch, New Zealand
Abstract Analyses of dinoflagellate cysts from
marine reptile sites in Marlborough, North Canterbury, North Otago, and
on Chatham Island, indicate that the localities range from Early to
latest Haumurian (Middle Campanian to Upper Maastrichtian) in age,
spanning a period of c. 15 m.y. Sites in the Waipara River area
are principally Upper Haumurian and range from the Alterbidinium
acutulum Zone to the Manumiella druggii Zone. Sites in the
Haumuri Bluff-Ngaroma Station-Cheviot/Jed River area are Lower
Haumurian to lower Upper Haumurian and range from the Satyrodinium
haumuriense Zone to the Isabelidinium pellucidum Zone. The
Shag Point locality is Upper Haumurian (Alterbidinium acutulum
Zone), indicating a general correlation with the Waipara localities.
The Chatham Island locality is Lower Haumurian (S. haumuriense
Zone), indicating a similar age to the oldest Haumuri Bluff sites.
Material from two unknown sites appears to be from the Waipara River
area, based on the associated dinoflagellate assemblages. Two marine
reptile faunas are indicated: a Mid-Campanian to Early Maastrichtian
fauna that is replaced by a Late Maastrichtian fauna.
Keywords dinoflagellates; marine reptiles; New
Zealand; South Island; Marlborough; North Canterbury; northeast Otago;
Chatham Islands; Upper Cretaceous; Maastrichtian Stage; Campanian
Stage; Haumurian Stage
G04011; Received 8 March 2004; accepted 17 December 2004; Online
publication date 3 June 2005
New Zealand Journal of Geology & Geophysics, 2005, Vol. 48:
377–387
0028–8306/05/4802–0377© The Royal Society of New Zealand 2005
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