The development of an atypical Hirnantia -brachiopod Fauna and the onset of glaciation in the late Ordovician of Gondwana
ABSTRACT The development of an atypical Hirnantia Fauna in the late Ordovician of Gondwana was coeval with a slow eustatic fall induced by the abstraction of water into a growing ice sheet. This event is dated as early Hirnantian in age and occurred in tandem with the start of a major mass extinctio...
Published in: | Transactions of the Royal Society of Edinburgh: Earth Sciences |
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Language: | English |
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Cambridge University Press (CUP)
2001
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Online Access: | http://dx.doi.org/10.1017/s0263593300000018 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300000018 |
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crcambridgeupr:10.1017/s0263593300000018 2024-04-28T08:24:49+00:00 The development of an atypical Hirnantia -brachiopod Fauna and the onset of glaciation in the late Ordovician of Gondwana Sutcliffe, Owen E. Harper, David A. T. Salem, Abdallah Aït Whittington, Robert J. Craig, Jonathan 2001 http://dx.doi.org/10.1017/s0263593300000018 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300000018 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Transactions of the Royal Society of Edinburgh: Earth Sciences volume 92, issue 1, page 1-14 ISSN 0263-5933 1473-7116 Paleontology Earth and Planetary Sciences (miscellaneous) journal-article 2001 crcambridgeupr https://doi.org/10.1017/s0263593300000018 2024-04-02T06:54:37Z ABSTRACT The development of an atypical Hirnantia Fauna in the late Ordovician of Gondwana was coeval with a slow eustatic fall induced by the abstraction of water into a growing ice sheet. This event is dated as early Hirnantian in age and occurred in tandem with the start of a major mass extinction. A tectonic episode in the Caradoc-Ashgill of North Africa differentiated the continental shelf into highs and lows and may have formed the land required for the accumulation of a permanent snow cover. Depositional lows were filled by regressive shallow-marine deposits in the early Hirnantian. During the mid-Hirnantian, advance and retreat of an ice sheet on the continental shelf resulted in the deposition of glaciomarine sediments above these regressive deposits. The demise of an atypical Hirnantia Fauna is attributed to deglaciation and the associated flooding of the continental shelf by a stratified anoxic water column. This glacioeustatic sea-level rise occurred in the late Hirnantian. Article in Journal/Newspaper Ice Sheet Cambridge University Press Transactions of the Royal Society of Edinburgh: Earth Sciences 92 1 1 14 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Paleontology Earth and Planetary Sciences (miscellaneous) |
spellingShingle |
Paleontology Earth and Planetary Sciences (miscellaneous) Sutcliffe, Owen E. Harper, David A. T. Salem, Abdallah Aït Whittington, Robert J. Craig, Jonathan The development of an atypical Hirnantia -brachiopod Fauna and the onset of glaciation in the late Ordovician of Gondwana |
topic_facet |
Paleontology Earth and Planetary Sciences (miscellaneous) |
description |
ABSTRACT The development of an atypical Hirnantia Fauna in the late Ordovician of Gondwana was coeval with a slow eustatic fall induced by the abstraction of water into a growing ice sheet. This event is dated as early Hirnantian in age and occurred in tandem with the start of a major mass extinction. A tectonic episode in the Caradoc-Ashgill of North Africa differentiated the continental shelf into highs and lows and may have formed the land required for the accumulation of a permanent snow cover. Depositional lows were filled by regressive shallow-marine deposits in the early Hirnantian. During the mid-Hirnantian, advance and retreat of an ice sheet on the continental shelf resulted in the deposition of glaciomarine sediments above these regressive deposits. The demise of an atypical Hirnantia Fauna is attributed to deglaciation and the associated flooding of the continental shelf by a stratified anoxic water column. This glacioeustatic sea-level rise occurred in the late Hirnantian. |
format |
Article in Journal/Newspaper |
author |
Sutcliffe, Owen E. Harper, David A. T. Salem, Abdallah Aït Whittington, Robert J. Craig, Jonathan |
author_facet |
Sutcliffe, Owen E. Harper, David A. T. Salem, Abdallah Aït Whittington, Robert J. Craig, Jonathan |
author_sort |
Sutcliffe, Owen E. |
title |
The development of an atypical Hirnantia -brachiopod Fauna and the onset of glaciation in the late Ordovician of Gondwana |
title_short |
The development of an atypical Hirnantia -brachiopod Fauna and the onset of glaciation in the late Ordovician of Gondwana |
title_full |
The development of an atypical Hirnantia -brachiopod Fauna and the onset of glaciation in the late Ordovician of Gondwana |
title_fullStr |
The development of an atypical Hirnantia -brachiopod Fauna and the onset of glaciation in the late Ordovician of Gondwana |
title_full_unstemmed |
The development of an atypical Hirnantia -brachiopod Fauna and the onset of glaciation in the late Ordovician of Gondwana |
title_sort |
development of an atypical hirnantia -brachiopod fauna and the onset of glaciation in the late ordovician of gondwana |
publisher |
Cambridge University Press (CUP) |
publishDate |
2001 |
url |
http://dx.doi.org/10.1017/s0263593300000018 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300000018 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Transactions of the Royal Society of Edinburgh: Earth Sciences volume 92, issue 1, page 1-14 ISSN 0263-5933 1473-7116 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0263593300000018 |
container_title |
Transactions of the Royal Society of Edinburgh: Earth Sciences |
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92 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
14 |
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1797584859727659008 |