First cosmogenic 10 Be constraints on LGM glaciation on New Zealand's North Island: Park Valley, Tararua Range
Abstract We report the first direct ages for late Quaternary glaciation on the North Island of New Zealand. Mt Ruapehu, the volcanic massif in the North Island's centre, is currently glaciated and probably sustained glaciers throughout the late Quaternary, yet no numeric ages have been reported...
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crwiley:10.1002/jqs.1188 2024-06-02T07:58:29+00:00 First cosmogenic 10 Be constraints on LGM glaciation on New Zealand's North Island: Park Valley, Tararua Range Brook, Martin S. Shulmeister, James Crow, Tyne V. H. Zondervan, Albert 2008 http://dx.doi.org/10.1002/jqs.1188 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1188 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1188 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 23, issue 8, page 707-712 ISSN 0267-8179 1099-1417 journal-article 2008 crwiley https://doi.org/10.1002/jqs.1188 2024-05-03T11:51:39Z Abstract We report the first direct ages for late Quaternary glaciation on the North Island of New Zealand. Mt Ruapehu, the volcanic massif in the North Island's centre, is currently glaciated and probably sustained glaciers throughout the late Quaternary, yet no numeric ages have been reported for glacial advances anywhere on the North Island. Here, we describe cosmogenic 10 Be ages of the surface layers of a glacially transported boulder and glacially polished bedrock from the Tararua Range, part of the axial ranges of the North Island. Results indicate that a limited valley glaciation occurred, culminating in recession at the end of the last glacial coldest period (LGCP, ca. 18 ka). This provides an initial age for deglaciation on the North Island during the last glacial–interglacial transition (LGIT). It appears that glaciation occurred in response to an equilibrium‐line altitude (ELA) lowering of ∼1400 m below the present‐day mean summer freezing level. Ages for glaciation in the Tararua Range correspond closely to exposure ages for the last glacial maximum (LGM) from the lateral moraines of Cascade Valley in the South Island, and in Cobb Valley, in northern South Island. The corollary is that glaciation in the Tararua Range coincided with the phase of maximum cooling during MIS 2, prior to the Antarctic Cold Reversal (ACR), during the LGCP. Copyright © 2008 John Wiley & Sons, Ltd. Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library Antarctic The Antarctic New Zealand Ela ENVELOPE(9.642,9.642,63.170,63.170) Journal of Quaternary Science 23 8 707 712 |
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English |
description |
Abstract We report the first direct ages for late Quaternary glaciation on the North Island of New Zealand. Mt Ruapehu, the volcanic massif in the North Island's centre, is currently glaciated and probably sustained glaciers throughout the late Quaternary, yet no numeric ages have been reported for glacial advances anywhere on the North Island. Here, we describe cosmogenic 10 Be ages of the surface layers of a glacially transported boulder and glacially polished bedrock from the Tararua Range, part of the axial ranges of the North Island. Results indicate that a limited valley glaciation occurred, culminating in recession at the end of the last glacial coldest period (LGCP, ca. 18 ka). This provides an initial age for deglaciation on the North Island during the last glacial–interglacial transition (LGIT). It appears that glaciation occurred in response to an equilibrium‐line altitude (ELA) lowering of ∼1400 m below the present‐day mean summer freezing level. Ages for glaciation in the Tararua Range correspond closely to exposure ages for the last glacial maximum (LGM) from the lateral moraines of Cascade Valley in the South Island, and in Cobb Valley, in northern South Island. The corollary is that glaciation in the Tararua Range coincided with the phase of maximum cooling during MIS 2, prior to the Antarctic Cold Reversal (ACR), during the LGCP. Copyright © 2008 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Brook, Martin S. Shulmeister, James Crow, Tyne V. H. Zondervan, Albert |
spellingShingle |
Brook, Martin S. Shulmeister, James Crow, Tyne V. H. Zondervan, Albert First cosmogenic 10 Be constraints on LGM glaciation on New Zealand's North Island: Park Valley, Tararua Range |
author_facet |
Brook, Martin S. Shulmeister, James Crow, Tyne V. H. Zondervan, Albert |
author_sort |
Brook, Martin S. |
title |
First cosmogenic 10 Be constraints on LGM glaciation on New Zealand's North Island: Park Valley, Tararua Range |
title_short |
First cosmogenic 10 Be constraints on LGM glaciation on New Zealand's North Island: Park Valley, Tararua Range |
title_full |
First cosmogenic 10 Be constraints on LGM glaciation on New Zealand's North Island: Park Valley, Tararua Range |
title_fullStr |
First cosmogenic 10 Be constraints on LGM glaciation on New Zealand's North Island: Park Valley, Tararua Range |
title_full_unstemmed |
First cosmogenic 10 Be constraints on LGM glaciation on New Zealand's North Island: Park Valley, Tararua Range |
title_sort |
first cosmogenic 10 be constraints on lgm glaciation on new zealand's north island: park valley, tararua range |
publisher |
Wiley |
publishDate |
2008 |
url |
http://dx.doi.org/10.1002/jqs.1188 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1188 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1188 |
long_lat |
ENVELOPE(9.642,9.642,63.170,63.170) |
geographic |
Antarctic The Antarctic New Zealand Ela |
geographic_facet |
Antarctic The Antarctic New Zealand Ela |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Journal of Quaternary Science volume 23, issue 8, page 707-712 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.1188 |
container_title |
Journal of Quaternary Science |
container_volume |
23 |
container_issue |
8 |
container_start_page |
707 |
op_container_end_page |
712 |
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1800741832910438400 |