Measured section through the boundary stratotype sections of the Arowhanan, Mangaotanean and Teratan Stages (Late Cretaceous) in Mangaotane Stream, Raukumara Peninsula, New Zealand

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Crampton JS, Schioler P. 2019. Measured section through the boundary stratotype sections of the Arowhanan, Mangaotanean and Teratan Stages (Late Cretaceous) in Mangaotane Stream, Raukumara Peninsula, New Zealand. Lower Hutt (NZ): GNS Science. 142 p. (GNS Science report; 2019/32). doi:10.21420/4BGX-A271.

Abstract: Mangaotane Stream lies in the Raukumara Ranges, Raukumara Peninsula, North Island, New Zealand. The central part of the stream exposes a c. 1100 m-thick sequence of Late Cretaceous strata that are assigned largely to Karekare Formation. The sequence includes the lower boundary stratotype sections for the Arowhanan, Mangaotanean and Teratan stages of the New Zealand geological timescale (latest Cenomanian to Coniacian stages of the international timescale). The section has been sampled and studied for over 80 years, and previous studies include descriptions of the macro- and micropaleontology and carbon-isotope geochemistry. This report presents a new and relatively detailed measured section through these strata. During section measurement, a new suite of samples was collected at c. 10 m average spacing. In addition, most previously collected samples have been located within the new section. The purpose of this report is to collate new and existing stratigraphic and sampling information related to this important stratigraphic succession onto a common measured section, in order to facilitate future studies relating to the Cretaceous paleogeography, paleoclimate and paleobiology of Zealandia, and refinement of the geological timescale (auth)