Paleogeography of Early Paleozoic Laurentia and Meguma, Avalonia terranes via paleomagnetism and faunal review
Paleomagnetic assessment of 821 Cambrian to Silurian-aged rock specimens of igneous and sedimentary origin was used as a means to provide insight on the ancient geographies of the region in which these rocks are currently found. The Earth’s magnetic field direction can be recorded at the time of roc...
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ftunivwestonta:oai:ir.lib.uwo.ca:etd-6891 2023-10-01T03:57:37+02:00 Paleogeography of Early Paleozoic Laurentia and Meguma, Avalonia terranes via paleomagnetism and faunal review Warsame, Halima S 2017-11-07T22:30:00Z application/pdf https://ir.lib.uwo.ca/etd/5080 https://ir.lib.uwo.ca/context/etd/article/6891/viewcontent/Warsame__H.S._MSc_Thesis___final_submission.pdf English eng Scholarship@Western https://ir.lib.uwo.ca/etd/5080 https://ir.lib.uwo.ca/context/etd/article/6891/viewcontent/Warsame__H.S._MSc_Thesis___final_submission.pdf Electronic Thesis and Dissertation Repository paleomagnetism paleogeography Laurentia Meguma Avalonia Geology Paleobiology Tectonics and Structure text 2017 ftunivwestonta 2023-09-03T07:28:17Z Paleomagnetic assessment of 821 Cambrian to Silurian-aged rock specimens of igneous and sedimentary origin was used as a means to provide insight on the ancient geographies of the region in which these rocks are currently found. The Earth’s magnetic field direction can be recorded at the time of rock formation and/or at a later significant event by magnetic minerals, allowing these signatures to be used to track the past motions of the continents. Stepwise demagnetization of the Port au Port, St. George and Table Head Groups in western Newfoundland, and the Mavillette gabbro (426 +/- 2 Ma, U-Pb baddeleyite) of southwestern Nova Scotia has revealed an overprint magnetization (D=161º, I=4º; D=155º, I=8º) that was acquired when Laurentia and the accreted Meguma terrane were near the equator during the Mid-to-Late Paleozoic. The effects of the Alleghenian orogeny may have been responsible for a significant overprint event during the Carboniferous that resulted in remagnetization of these rocks. Text Newfoundland The University of Western Ontario: Scholarship@Western Table Head ENVELOPE(-55.698,-55.698,52.083,52.083) |
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collection |
The University of Western Ontario: Scholarship@Western |
op_collection_id |
ftunivwestonta |
language |
English |
topic |
paleomagnetism paleogeography Laurentia Meguma Avalonia Geology Paleobiology Tectonics and Structure |
spellingShingle |
paleomagnetism paleogeography Laurentia Meguma Avalonia Geology Paleobiology Tectonics and Structure Warsame, Halima S Paleogeography of Early Paleozoic Laurentia and Meguma, Avalonia terranes via paleomagnetism and faunal review |
topic_facet |
paleomagnetism paleogeography Laurentia Meguma Avalonia Geology Paleobiology Tectonics and Structure |
description |
Paleomagnetic assessment of 821 Cambrian to Silurian-aged rock specimens of igneous and sedimentary origin was used as a means to provide insight on the ancient geographies of the region in which these rocks are currently found. The Earth’s magnetic field direction can be recorded at the time of rock formation and/or at a later significant event by magnetic minerals, allowing these signatures to be used to track the past motions of the continents. Stepwise demagnetization of the Port au Port, St. George and Table Head Groups in western Newfoundland, and the Mavillette gabbro (426 +/- 2 Ma, U-Pb baddeleyite) of southwestern Nova Scotia has revealed an overprint magnetization (D=161º, I=4º; D=155º, I=8º) that was acquired when Laurentia and the accreted Meguma terrane were near the equator during the Mid-to-Late Paleozoic. The effects of the Alleghenian orogeny may have been responsible for a significant overprint event during the Carboniferous that resulted in remagnetization of these rocks. |
format |
Text |
author |
Warsame, Halima S |
author_facet |
Warsame, Halima S |
author_sort |
Warsame, Halima S |
title |
Paleogeography of Early Paleozoic Laurentia and Meguma, Avalonia terranes via paleomagnetism and faunal review |
title_short |
Paleogeography of Early Paleozoic Laurentia and Meguma, Avalonia terranes via paleomagnetism and faunal review |
title_full |
Paleogeography of Early Paleozoic Laurentia and Meguma, Avalonia terranes via paleomagnetism and faunal review |
title_fullStr |
Paleogeography of Early Paleozoic Laurentia and Meguma, Avalonia terranes via paleomagnetism and faunal review |
title_full_unstemmed |
Paleogeography of Early Paleozoic Laurentia and Meguma, Avalonia terranes via paleomagnetism and faunal review |
title_sort |
paleogeography of early paleozoic laurentia and meguma, avalonia terranes via paleomagnetism and faunal review |
publisher |
Scholarship@Western |
publishDate |
2017 |
url |
https://ir.lib.uwo.ca/etd/5080 https://ir.lib.uwo.ca/context/etd/article/6891/viewcontent/Warsame__H.S._MSc_Thesis___final_submission.pdf |
long_lat |
ENVELOPE(-55.698,-55.698,52.083,52.083) |
geographic |
Table Head |
geographic_facet |
Table Head |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Electronic Thesis and Dissertation Repository |
op_relation |
https://ir.lib.uwo.ca/etd/5080 https://ir.lib.uwo.ca/context/etd/article/6891/viewcontent/Warsame__H.S._MSc_Thesis___final_submission.pdf |
_version_ |
1778529381982928896 |