Paleomagnetic study of the late Neoproterozoic Bull Arm and Crown Hill formations (Musgravetown Group) of eastern Newfoundland: implications for Avalonia and West Gondwana paleogeography
A paleomagnetic study of subaerial volcanic rocks and associated siltstones of the Ediacaran Bull Arm Formation in the Avalon Zone of Newfoundland revealed a stable bipolar, hematite-borne primary remanence supported by positive conglomerate, contact, and fold tests. Mean remanence directions in two...
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| Format: | Journal Article |
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National Research Council Canada
2012
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| Online Access: | http://www.nrcresearchpress.com/doi/pdf/10.1139/e11-045 http://hdl.handle.net/20.500.11937/42427 |
| _version_ | 1848756416481853440 |
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| author | Pisarevsky, Sergei McCausland, P. Hodych, J. O'Brien, S. Tait, J. Murphy, J. |
| author_facet | Pisarevsky, Sergei McCausland, P. Hodych, J. O'Brien, S. Tait, J. Murphy, J. |
| author_sort | Pisarevsky, Sergei |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A paleomagnetic study of subaerial volcanic rocks and associated siltstones of the Ediacaran Bull Arm Formation in the Avalon Zone of Newfoundland revealed a stable bipolar, hematite-borne primary remanence supported by positive conglomerate, contact, and fold tests. Mean remanence directions in two distal areas (Bonavista and Argentia) are similar, indicating a low paleolatitude position of Avalonia at ~570 Ma. Redbeds of the overlying ~550 Ma Crown Hill Formation also carry a primary bipolar hematite-borne remanence with moderate inclination, indicating that Avalonia remained at low to medium paleolatitudes through the end of the Ediacaran. Combining our results with previously published paleomagnetic data of Avalonia suggests moderate-scale drift of Avalonia through low southern paleolatitudes through the latter half of the Ediacaran, providing a paleogeographic context for the development of the first complex metazoan life. |
| first_indexed | 2025-11-14T09:11:51Z |
| format | Journal Article |
| id | curtin-20.500.11937-42427 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:11:51Z |
| publishDate | 2012 |
| publisher | National Research Council Canada |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-424272019-02-19T04:27:52Z Paleomagnetic study of the late Neoproterozoic Bull Arm and Crown Hill formations (Musgravetown Group) of eastern Newfoundland: implications for Avalonia and West Gondwana paleogeography Pisarevsky, Sergei McCausland, P. Hodych, J. O'Brien, S. Tait, J. Murphy, J. Ediacaran Ediacaran Bull Arm Formation metazoan life Crown Hill Formation remanence Avalonia A paleomagnetic study of subaerial volcanic rocks and associated siltstones of the Ediacaran Bull Arm Formation in the Avalon Zone of Newfoundland revealed a stable bipolar, hematite-borne primary remanence supported by positive conglomerate, contact, and fold tests. Mean remanence directions in two distal areas (Bonavista and Argentia) are similar, indicating a low paleolatitude position of Avalonia at ~570 Ma. Redbeds of the overlying ~550 Ma Crown Hill Formation also carry a primary bipolar hematite-borne remanence with moderate inclination, indicating that Avalonia remained at low to medium paleolatitudes through the end of the Ediacaran. Combining our results with previously published paleomagnetic data of Avalonia suggests moderate-scale drift of Avalonia through low southern paleolatitudes through the latter half of the Ediacaran, providing a paleogeographic context for the development of the first complex metazoan life. 2012 Journal Article http://hdl.handle.net/20.500.11937/42427 http://www.nrcresearchpress.com/doi/pdf/10.1139/e11-045 National Research Council Canada restricted |
| spellingShingle | Ediacaran Ediacaran Bull Arm Formation metazoan life Crown Hill Formation remanence Avalonia Pisarevsky, Sergei McCausland, P. Hodych, J. O'Brien, S. Tait, J. Murphy, J. Paleomagnetic study of the late Neoproterozoic Bull Arm and Crown Hill formations (Musgravetown Group) of eastern Newfoundland: implications for Avalonia and West Gondwana paleogeography |
| title | Paleomagnetic study of the late Neoproterozoic Bull Arm and Crown Hill formations (Musgravetown Group) of eastern Newfoundland: implications for Avalonia and West Gondwana paleogeography |
| title_full | Paleomagnetic study of the late Neoproterozoic Bull Arm and Crown Hill formations (Musgravetown Group) of eastern Newfoundland: implications for Avalonia and West Gondwana paleogeography |
| title_fullStr | Paleomagnetic study of the late Neoproterozoic Bull Arm and Crown Hill formations (Musgravetown Group) of eastern Newfoundland: implications for Avalonia and West Gondwana paleogeography |
| title_full_unstemmed | Paleomagnetic study of the late Neoproterozoic Bull Arm and Crown Hill formations (Musgravetown Group) of eastern Newfoundland: implications for Avalonia and West Gondwana paleogeography |
| title_short | Paleomagnetic study of the late Neoproterozoic Bull Arm and Crown Hill formations (Musgravetown Group) of eastern Newfoundland: implications for Avalonia and West Gondwana paleogeography |
| title_sort | paleomagnetic study of the late neoproterozoic bull arm and crown hill formations (musgravetown group) of eastern newfoundland: implications for avalonia and west gondwana paleogeography |
| topic | Ediacaran Ediacaran Bull Arm Formation metazoan life Crown Hill Formation remanence Avalonia |
| url | http://www.nrcresearchpress.com/doi/pdf/10.1139/e11-045 http://hdl.handle.net/20.500.11937/42427 |