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Waipara River, M34/f1073 (Cretaceous of New Zealand)

Where: Canterbury, New Zealand (43.1° S, 172.6° E: paleocoordinates 58.1° S, 150.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Alterbidinium acutulum dinoflagellate Zone other zone, Conway Formation, Haumurian (84.9 - 66.0 Ma)

• Conway Formation, lower Maastrichtian (A. acutulum dinoflagellate zone (Wilson et al. in prep.)).

•If Zfr 73 and Zfr 91 were indeed found along the Waipara River (Fig. 1), then they would have been derived from the Conway Formation (Fig. 2), which crops out across a wide area of North Canterbury and southern Marlborough, and has been the main source of marine reptile fossils in the South Island... Recent biostratigraphical work has shown that the Conway Formation in the mid-Waipara River section extends from the Haumurian Stage (Late Cretaceous) up into the Teurian Stage (Early Paleocene) of the local New Zealand time scale, spanning the K/T boundary (Hollis and Strong 2003; Fig. 2).

•From the lower/upstream part of the section, the lower part of the formation, upper Haumurian.

• bed-level stratigraphic resolution

Environment/lithology: basinal (); massive, concretionary, gray siltstone

• The sedimentary and geochemical characteristics of the Conway Formation suggest deposition under poorly oxygenated conditions free from strong currents or wave activity (Warren and Speden 1978). An analogous depositional setting could be a barred submarine depression or series of depressions similar to those of the present day Santa Barbara Basin off California (Warren and Speden 1978).
• Throughout most of its outcrop area, the Conway Formation is a soft, easily eroded massive dark grey siltstone or silty sandstone in which pervasive bioturbation has all but obliterated primary sedimentary structures. Large subspherical calcareous concretions are a distinctive feature of the unit, particularly in the lower part.

Size classes: macrofossils, mesofossils, microfossils

Collected by Alexander McKay in 1872

• Catalogue entries for both specimens indicate that they were probably collected along the Waipara River some time before 1891 and possibly before 1888. They may form part of the collections made for the Museum by Alexander McKay in 1872 (Welles and Gregg 1971, p. 14)

Primary reference: N. Hiller and A. Mannering. 2004. Elasmosaur (Reptilia: Plesiosauria) skull remains fromt he Upper Cretaceous of North Canterbury, New Zealand. Records of the Canterbury Museum 18:1-7 [R. Benson/R. Benson] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 155319: authorized by Roger Benson, entered by Roger Benson on 08.04.2014, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)