Phanerozoic Australia in the changing configuration of proto-Pangea through Gondwanaland and Pangea to the present dispersed continents
The neotectonic supercycle of earth history started 320 million years ago with the initial coalescence of the continents in Pangea. Final coalescence took place 230 Ma ago at the same time as rift valleys induced incipient breakup that became actual from 160 Ma with the start of seafloor spreading i...
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/bba27eb5-6e08-4757-aa77-e41b9d3d0776 2023-05-15T13:51:16+02:00 Phanerozoic Australia in the changing configuration of proto-Pangea through Gondwanaland and Pangea to the present dispersed continents Veevers, J. J. 1991-09-03 https://researchers.mq.edu.au/en/publications/bba27eb5-6e08-4757-aa77-e41b9d3d0776 https://doi.org/10.1071/SB9910001 http://www.scopus.com/inward/record.url?scp=0026267534&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Veevers , J J 1991 , ' Phanerozoic Australia in the changing configuration of proto-Pangea through Gondwanaland and Pangea to the present dispersed continents ' , Australian Systematic Botany , vol. 4 , no. 1 , pp. 1-11 . https://doi.org/10.1071/SB9910001 article 1991 ftmacquarieunicr https://doi.org/10.1071/SB9910001 2022-02-18T14:44:07Z The neotectonic supercycle of earth history started 320 million years ago with the initial coalescence of the continents in Pangea. Final coalescence took place 230 Ma ago at the same time as rift valleys induced incipient breakup that became actual from 160 Ma with the start of seafloor spreading in the Atlantic and Indian Oceans. The current phase of seafloor spreading is marked by the growth lines of magnetic anomalies, from which reconstructions of the continents during the past 160 Ma are accurately determinable by eliminating the dated parts of the seafloor. Many small terranes or fragments are not so well constrained. Palaeolatitude is less precisely determined by continental indicators of magnetic inclination. All this physical evidence provides a unique solution for continental reconstruction since 320 Ma. Less definite evidence provided by biota and geological facies has to be accommodated within this physical framework. Before the coalescence of Pangea (> 320 Ma) the constraints are reversed. This paleotectonic phase lacks preserved seafloor spreading so that continental palaeomagnetism, biota and geological facies are the only indicators. The changing configuration of Australia and its neighbours in the eastern Gondwanaland province of Pangea — India, Antarctica, Lord Howe Rise-New Zealand Plateau — is detailed through seven stages from the mid-Jurassic breakup of Pangea. Article in Journal/Newspaper Antarc* Antarctica Macquarie University Research Portal Indian New Zealand Australian Systematic Botany 4 1 1 |
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Open Polar |
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Macquarie University Research Portal |
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ftmacquarieunicr |
language |
English |
description |
The neotectonic supercycle of earth history started 320 million years ago with the initial coalescence of the continents in Pangea. Final coalescence took place 230 Ma ago at the same time as rift valleys induced incipient breakup that became actual from 160 Ma with the start of seafloor spreading in the Atlantic and Indian Oceans. The current phase of seafloor spreading is marked by the growth lines of magnetic anomalies, from which reconstructions of the continents during the past 160 Ma are accurately determinable by eliminating the dated parts of the seafloor. Many small terranes or fragments are not so well constrained. Palaeolatitude is less precisely determined by continental indicators of magnetic inclination. All this physical evidence provides a unique solution for continental reconstruction since 320 Ma. Less definite evidence provided by biota and geological facies has to be accommodated within this physical framework. Before the coalescence of Pangea (> 320 Ma) the constraints are reversed. This paleotectonic phase lacks preserved seafloor spreading so that continental palaeomagnetism, biota and geological facies are the only indicators. The changing configuration of Australia and its neighbours in the eastern Gondwanaland province of Pangea — India, Antarctica, Lord Howe Rise-New Zealand Plateau — is detailed through seven stages from the mid-Jurassic breakup of Pangea. |
format |
Article in Journal/Newspaper |
author |
Veevers, J. J. |
spellingShingle |
Veevers, J. J. Phanerozoic Australia in the changing configuration of proto-Pangea through Gondwanaland and Pangea to the present dispersed continents |
author_facet |
Veevers, J. J. |
author_sort |
Veevers, J. J. |
title |
Phanerozoic Australia in the changing configuration of proto-Pangea through Gondwanaland and Pangea to the present dispersed continents |
title_short |
Phanerozoic Australia in the changing configuration of proto-Pangea through Gondwanaland and Pangea to the present dispersed continents |
title_full |
Phanerozoic Australia in the changing configuration of proto-Pangea through Gondwanaland and Pangea to the present dispersed continents |
title_fullStr |
Phanerozoic Australia in the changing configuration of proto-Pangea through Gondwanaland and Pangea to the present dispersed continents |
title_full_unstemmed |
Phanerozoic Australia in the changing configuration of proto-Pangea through Gondwanaland and Pangea to the present dispersed continents |
title_sort |
phanerozoic australia in the changing configuration of proto-pangea through gondwanaland and pangea to the present dispersed continents |
publishDate |
1991 |
url |
https://researchers.mq.edu.au/en/publications/bba27eb5-6e08-4757-aa77-e41b9d3d0776 https://doi.org/10.1071/SB9910001 http://www.scopus.com/inward/record.url?scp=0026267534&partnerID=8YFLogxK |
geographic |
Indian New Zealand |
geographic_facet |
Indian New Zealand |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Veevers , J J 1991 , ' Phanerozoic Australia in the changing configuration of proto-Pangea through Gondwanaland and Pangea to the present dispersed continents ' , Australian Systematic Botany , vol. 4 , no. 1 , pp. 1-11 . https://doi.org/10.1071/SB9910001 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1071/SB9910001 |
container_title |
Australian Systematic Botany |
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4 |
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1 |
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1 |
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