There is no geophysical evidence for the Mahuika Crater on the continental shelf southwest of New Zealand

This study examines new bathymetric and geophysical evidence that questions the existence of the Mahuika Crater: a proposed impact depression 20.2 km wide lying on the continental shelf ∼250 km SW of New Zealand. Multibeam echo sounder and sub-bottom profiler data across the published location of th...

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Bibliographic Details
Published in:	New Zealand journal of geology and geophysics Vol. 67; no. 1; pp. 138 - 145
Main Author:	Mackay, Kevin A.
Format:	Journal Article
Language:	English
Published:	Abingdon Taylor & Francis 02-01-2024 Taylor & Francis Ltd
Subjects:	Bathymetric data Bathymetry comet Continental shelves Craters Echo sounding Echoes Geophysics impact crater multibeam seafloor Snares Islands/Tini Heke Sub-bottom profiling
Online Access:	Get full text
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Summary:	This study examines new bathymetric and geophysical evidence that questions the existence of the Mahuika Crater: a proposed impact depression 20.2 km wide lying on the continental shelf ∼250 km SW of New Zealand. Multibeam echo sounder and sub-bottom profiler data across the published location of the crater were collected and synthesised with existing bathymetric data for the wider region to assess the validity of such a claim. We conclude that there is no geophysical basis for the existence for the Mahuika impact crater in the region, the initial presumption of a crater was unsubstantiated, and is a myth propagated in the literature.
ISSN:	0028-8306 1175-8791
DOI:	10.1080/00288306.2022.2121288