New Zealand Journal of Geology and Geophysics abstracts

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Lithostratigraphy of the Te Kuiti Group: a revision

P. J. WHITE¹

B. C. WATERHOUSE²

Institute of Geological and Nuclear Sciences
P.O. Box 2225
Auckland, New Zealand

¹Present address: KRTA Ltd, P.O. Box 9806, Newmarket, Auckland, New Zealand.

²Present address: Broomfield Rd, RD1, Howick, Auckland, New Zealand.

Abstract The Te Kuiti Group in the South Auckland area comprises nine formations of late Eocene to early Miocene age, and is dominated by calcareous sandstones, siltstones, and limestones. This paper revises the stratigraphy and nomenclature of the group. Te Akatea Siltstone and Whaingaroa Siltstone are renamed Te Akatea Formation and Whaingaroa Formation, respectively, and the base of Te Akatea Formation is redefined. Minor changes of nomenclature are proposed for members of Glen Massey and Mangakotuku Formations, to avoid duplication of the formation name. Four new members are proposed within Aotea Formation: Patikirau Siltstone and Mangiti Sandstone to the north of Mt Karioi, and Kihi Sandstone and Hauturu Sandstone to the south. Two new members are distinguished within Whaingaroa Formation: Orotangi Sandstone and Kotuku Siltstone. Existing type localities for Te Akatea and Aotea Formations are replaced by more representative and complete sections, and additional reference sections are proposed for Aotea and Whaingaroa Formations. The geographic distribution of formations and members highlights a significant facies change at the approximate latitude of Mt Karioi: siltstones predominate to the north and sandstones to the south.

Keywords lithostratigraphy; Te Kuiti Group; Mangakotuku Formation; Rotowaro Siltstone; Glen Massey Formation; Ahirau Sandstone; Whaingaroa Formation; Kotuku Siltstone; Orotangi Sandstone; Aotea Formation; Mangiti Sandstone; Patikirau Siltstone; Hauturu Sandstone; Kihi Sandstone; Te Akatea Formation; Orahiri Limestone; Waitomo Sandstone; Otorohanga Limestone; new stratigraphic names

Received 3 November 1992; published 25 June 1993
New Zealand Journal of Geology & Geophysics, 1991, Vol. 36: 257—266
0028Ð8306/06/3602—0257 ©The Royal Society of New Zealand 1991

PDF file of entire paper: medium quality (4313K); (scanned from paper original: notes about this process). Digitisation of this article from the printed journal was kindly facilitated by the Geological Society of New Zealand

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