New Zealand Journal of Geology & Geophysics abstracts
Pleistocene glaciomarine sediments of the Kisbee Formation, Wilson
River, southwest Fiordland, and some tectonic and paleoclimatic
implications
Ian Turnbull
GNS Science
Private Bag 1930
Dunedin 9054, New Zealand
i.turnbull@gns.cri.nz
Rupert Sutherland
Alan Beu
GNS Science
PO Box 30368
Lower Hutt 5040, New Zealand
Anthony R. Edwards
Stratigraphic Solutions Ltd
PO Box 295
Waikanae 5250, New Zealand
Abstract Fossiliferous sediments of Kisbee
Formation
(new name) preserved in the Wilson River east of Puysegur Point,
southwest Fiordland, are interpreted as filling a submarine canyon that
was incised 160 m into Ordovician metasediments. The formation reflects
deposition in quiet, deep cold water beneath floating ice, transitional
into shallower water adjacent to an ice-marginal environment. The
macrofauna and nannoflora indicate deposition within Castlecliffian
time, somewhere between 0.5 and 1.2 Ma, at depths estimated to range
between 50–150 and >200 m. A sequence of marine terraces adjacent to
the Wilson River is correlated to global sea-level records,
constraining the local uplift rate to 0.57 ± 0.04 mm/yr
and the minimum age for Kisbee Formation to 0.69 Ma. If, as seems
likely, the Matuyama-Brunhes paleomagnetic transition lies within the
mapped section, Kisbee Formation is older than 0.78 Ma at the the base,
and Limopsis lived in >200 m of water.
Keywords Southwest Fiordland; Kisbee
Formation; glaciomarine;
marine terraces; Zygochlamys; nannofossils; Castlecliffian;
Pleistocene; Quaternary uplift; paleoenvironment; new stratigraphic
name
G06012; Online publication date 17 July 2007; Received 29 May 2006;
accepted 21 May 2007
New Zealand Journal of Geology & Geophysics, 2007, Vol. 50:
193–204
0028–8306/07/5003–0193 © The Royal Society of New Zealand 2007
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