Short polarity intervals within the Matuyama: transitional field records from hydraulic piston cored sediments from the North Atlantic
Detailed sampling of two short magnetozones within the Matuyama Chronozone recorded at DSDP Site 609 (49.86°N, 335.77°E) confirms that one, the Cobb Mountain Subchronozone (1.12 Ma), is a very short, full normal polarity interval and that the other, the older interval, is a record of a geomagnetic e...
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ftdatacite:10.7916/d81z4dxk 2023-05-15T17:33:48+02:00 Short polarity intervals within the Matuyama: transitional field records from hydraulic piston cored sediments from the North Atlantic Clement, Brad M. Kent, Dennis V. 1986 https://dx.doi.org/10.7916/d81z4dxk https://academiccommons.columbia.edu/doi/10.7916/D81Z4DXK unknown Columbia University Geophysics Plate tectonics Text Articles article-journal ScholarlyArticle 1986 ftdatacite https://doi.org/10.7916/d81z4dxk 2021-11-05T12:55:41Z Detailed sampling of two short magnetozones within the Matuyama Chronozone recorded at DSDP Site 609 (49.86°N, 335.77°E) confirms that one, the Cobb Mountain Subchronozone (1.12 Ma), is a very short, full normal polarity interval and that the other, the older interval, is a record of a geomagnetic excursion which occurred at approximately 1.55 Ma. The Cobb Mountain Subchron lasted approximately 25,000 years, one third the duration of the Jaramillo Subchron. The normal polarity interval is bounded by two transition zones which document an antisymmetry in the sequence of directions in the reverse to normal and normal to reverse polarity transitions. We interpret the antisymmetry as reflecting a dependence upon the sense of the reversal, without significant changes in the relative contributions of non-dipole terms. The polarity interval recorded at 1.55 Ma lasted only 8,800 years with what may be regarded as full polarity directions observed across only 3 cm of stratigraphic section. This feature is interpreted as an excursion of the geomagnetic field and appears to be correlative with the Gilsa Subchron. Similarities between the transition bounding these two magnetozones suggest that these features occur as the result of the same process or triggering mechanisms in the earth's outer core. Text North Atlantic DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Geophysics Plate tectonics |
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Geophysics Plate tectonics Clement, Brad M. Kent, Dennis V. Short polarity intervals within the Matuyama: transitional field records from hydraulic piston cored sediments from the North Atlantic |
topic_facet |
Geophysics Plate tectonics |
description |
Detailed sampling of two short magnetozones within the Matuyama Chronozone recorded at DSDP Site 609 (49.86°N, 335.77°E) confirms that one, the Cobb Mountain Subchronozone (1.12 Ma), is a very short, full normal polarity interval and that the other, the older interval, is a record of a geomagnetic excursion which occurred at approximately 1.55 Ma. The Cobb Mountain Subchron lasted approximately 25,000 years, one third the duration of the Jaramillo Subchron. The normal polarity interval is bounded by two transition zones which document an antisymmetry in the sequence of directions in the reverse to normal and normal to reverse polarity transitions. We interpret the antisymmetry as reflecting a dependence upon the sense of the reversal, without significant changes in the relative contributions of non-dipole terms. The polarity interval recorded at 1.55 Ma lasted only 8,800 years with what may be regarded as full polarity directions observed across only 3 cm of stratigraphic section. This feature is interpreted as an excursion of the geomagnetic field and appears to be correlative with the Gilsa Subchron. Similarities between the transition bounding these two magnetozones suggest that these features occur as the result of the same process or triggering mechanisms in the earth's outer core. |
format |
Text |
author |
Clement, Brad M. Kent, Dennis V. |
author_facet |
Clement, Brad M. Kent, Dennis V. |
author_sort |
Clement, Brad M. |
title |
Short polarity intervals within the Matuyama: transitional field records from hydraulic piston cored sediments from the North Atlantic |
title_short |
Short polarity intervals within the Matuyama: transitional field records from hydraulic piston cored sediments from the North Atlantic |
title_full |
Short polarity intervals within the Matuyama: transitional field records from hydraulic piston cored sediments from the North Atlantic |
title_fullStr |
Short polarity intervals within the Matuyama: transitional field records from hydraulic piston cored sediments from the North Atlantic |
title_full_unstemmed |
Short polarity intervals within the Matuyama: transitional field records from hydraulic piston cored sediments from the North Atlantic |
title_sort |
short polarity intervals within the matuyama: transitional field records from hydraulic piston cored sediments from the north atlantic |
publisher |
Columbia University |
publishDate |
1986 |
url |
https://dx.doi.org/10.7916/d81z4dxk https://academiccommons.columbia.edu/doi/10.7916/D81Z4DXK |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_doi |
https://doi.org/10.7916/d81z4dxk |
_version_ |
1766132423867760640 |