High-resolution seismic imaging reveals infill history of a submerged Quaternary fjord system in the subantarctic Auckland Islands, New Zealand
Abstract Quaternary processes and environmental changes are often difficult to assess in remote subantarctic islands due to high surface erosion rates and overprinting of sedimentary products in locations that can be a challenge to access. We present a set of high-resolution, multichannel seismic li...
Published in: | Quaternary Research |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2019
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/qua.2019.58 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589419000589 |
id |
crcambridgeupr:10.1017/qua.2019.58 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/qua.2019.58 2024-03-03T08:42:52+00:00 High-resolution seismic imaging reveals infill history of a submerged Quaternary fjord system in the subantarctic Auckland Islands, New Zealand Perkins, Edward J. Gorman, Andrew R. Tidey, Emily J. Wilson, Gary S. Ohneiser, Christian Moy, Christopher M. Riesselman, Christina R. Gilmer, Greer Ross, Ben S. 2019 http://dx.doi.org/10.1017/qua.2019.58 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589419000589 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 93, page 255-266 ISSN 0033-5894 1096-0287 General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) journal-article 2019 crcambridgeupr https://doi.org/10.1017/qua.2019.58 2024-02-08T08:34:04Z Abstract Quaternary processes and environmental changes are often difficult to assess in remote subantarctic islands due to high surface erosion rates and overprinting of sedimentary products in locations that can be a challenge to access. We present a set of high-resolution, multichannel seismic lines and complementary multibeam bathymetry collected off the eastern (leeward) side of the subantarctic Auckland Islands, about 465 km south of New Zealand's South Island. These data constrain the erosive and depositional history of the island group, and they reveal an extensive system of sediment-filled valleys that extend offshore to depths that exceed glacial low-stand sea level. Although shallow, marine, U-shaped valleys and moraines are imaged, the rugged offshore geomorphology of the paleovalley floors and the stratigraphy of infill sediments suggests that the valley floors were shaped by submarine fluvial erosion, and subsequently filled by lacustrine, fjord, and fluvial sedimentary processes. Article in Journal/Newspaper Auckland Islands Cambridge University Press New Zealand Quaternary Research 93 255 266 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) |
spellingShingle |
General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) Perkins, Edward J. Gorman, Andrew R. Tidey, Emily J. Wilson, Gary S. Ohneiser, Christian Moy, Christopher M. Riesselman, Christina R. Gilmer, Greer Ross, Ben S. High-resolution seismic imaging reveals infill history of a submerged Quaternary fjord system in the subantarctic Auckland Islands, New Zealand |
topic_facet |
General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) |
description |
Abstract Quaternary processes and environmental changes are often difficult to assess in remote subantarctic islands due to high surface erosion rates and overprinting of sedimentary products in locations that can be a challenge to access. We present a set of high-resolution, multichannel seismic lines and complementary multibeam bathymetry collected off the eastern (leeward) side of the subantarctic Auckland Islands, about 465 km south of New Zealand's South Island. These data constrain the erosive and depositional history of the island group, and they reveal an extensive system of sediment-filled valleys that extend offshore to depths that exceed glacial low-stand sea level. Although shallow, marine, U-shaped valleys and moraines are imaged, the rugged offshore geomorphology of the paleovalley floors and the stratigraphy of infill sediments suggests that the valley floors were shaped by submarine fluvial erosion, and subsequently filled by lacustrine, fjord, and fluvial sedimentary processes. |
format |
Article in Journal/Newspaper |
author |
Perkins, Edward J. Gorman, Andrew R. Tidey, Emily J. Wilson, Gary S. Ohneiser, Christian Moy, Christopher M. Riesselman, Christina R. Gilmer, Greer Ross, Ben S. |
author_facet |
Perkins, Edward J. Gorman, Andrew R. Tidey, Emily J. Wilson, Gary S. Ohneiser, Christian Moy, Christopher M. Riesselman, Christina R. Gilmer, Greer Ross, Ben S. |
author_sort |
Perkins, Edward J. |
title |
High-resolution seismic imaging reveals infill history of a submerged Quaternary fjord system in the subantarctic Auckland Islands, New Zealand |
title_short |
High-resolution seismic imaging reveals infill history of a submerged Quaternary fjord system in the subantarctic Auckland Islands, New Zealand |
title_full |
High-resolution seismic imaging reveals infill history of a submerged Quaternary fjord system in the subantarctic Auckland Islands, New Zealand |
title_fullStr |
High-resolution seismic imaging reveals infill history of a submerged Quaternary fjord system in the subantarctic Auckland Islands, New Zealand |
title_full_unstemmed |
High-resolution seismic imaging reveals infill history of a submerged Quaternary fjord system in the subantarctic Auckland Islands, New Zealand |
title_sort |
high-resolution seismic imaging reveals infill history of a submerged quaternary fjord system in the subantarctic auckland islands, new zealand |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/qua.2019.58 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589419000589 |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Auckland Islands |
genre_facet |
Auckland Islands |
op_source |
Quaternary Research volume 93, page 255-266 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/qua.2019.58 |
container_title |
Quaternary Research |
container_volume |
93 |
container_start_page |
255 |
op_container_end_page |
266 |
_version_ |
1792498322097831936 |