Magnetostratigraphy of the Lodève Basin, France: Implications for the Permo-Carboniferous reversed superchron and the geocentric axial dipole
New results from the La Lieude Formation now complete the magneto-stratigraphic coverage of the Permian redbeds preserved in the Lodève Basin of southern France. The majority of the samples yield reversed polarity, with a mean of declination D = 187.4°, inclination I = −0.5° (Fisherian statistics k...
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| Veröffentlicht in: | Studia geophysica et geodaetica 2012-06, Vol.56 (3), p.725-734 |
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| description | New results from the La Lieude Formation now complete the magneto-stratigraphic coverage of the Permian redbeds preserved in the Lodève Basin of southern France. The majority of the samples yield reversed polarity, with a mean of declination D = 187.4°, inclination I = −0.5° (Fisherian statistics k = 44.2, α
95
= 5.6°, n = 16). Together with previously published results, these data indicate that the entire basin lies within the Permo-Carboniferous Reversed Superchron (PCRS). But the stratigraphically highest sample exhibits normal polarity, suggesting that the transition marking the end of the PCRS may be close. The unusual behaviour of the geodynamo that generates superchrons prompts one to ask if there are concomitant influences on the morphology of the field. The intersecting palaeomeridian method offers a means of pursuing this question. An updated analysis suggests that there are currently no compelling reasons for adding significant higher-order terms to the geocentric axial dipole (GAD) model for the Late Permian. |
| doi_str_mv | 10.1007/s11200-010-0082-y |
| format | Article |
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95
= 5.6°, n = 16). Together with previously published results, these data indicate that the entire basin lies within the Permo-Carboniferous Reversed Superchron (PCRS). But the stratigraphically highest sample exhibits normal polarity, suggesting that the transition marking the end of the PCRS may be close. The unusual behaviour of the geodynamo that generates superchrons prompts one to ask if there are concomitant influences on the morphology of the field. The intersecting palaeomeridian method offers a means of pursuing this question. An updated analysis suggests that there are currently no compelling reasons for adding significant higher-order terms to the geocentric axial dipole (GAD) model for the Late Permian.</description><identifier>ISSN: 0039-3169</identifier><identifier>EISSN: 1573-1626</identifier><identifier>DOI: 10.1007/s11200-010-0082-y</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Atmospheric Sciences ; Carboniferous ; Earth and Environmental Science ; Earth Sciences ; Geophysics ; Geophysics/Geodesy ; Magnetic fields ; Permian ; Stratigraphy ; Structural Geology</subject><ispartof>Studia geophysica et geodaetica, 2012-06, Vol.56 (3), p.725-734</ispartof><rights>Institute of Geophysics of the ASCR, v.v.i 2012</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a339t-be40fbc3092bc29439c7b077ee946b2671615bd7fbf9546a27a2507c32f4e3ba3</citedby><cites>FETCH-LOGICAL-a339t-be40fbc3092bc29439c7b077ee946b2671615bd7fbf9546a27a2507c32f4e3ba3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11200-010-0082-y$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11200-010-0082-y$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Evans, Michael E.</creatorcontrib><title>Magnetostratigraphy of the Lodève Basin, France: Implications for the Permo-Carboniferous reversed superchron and the geocentric axial dipole</title><title>Studia geophysica et geodaetica</title><addtitle>Stud Geophys Geod</addtitle><description>New results from the La Lieude Formation now complete the magneto-stratigraphic coverage of the Permian redbeds preserved in the Lodève Basin of southern France. The majority of the samples yield reversed polarity, with a mean of declination D = 187.4°, inclination I = −0.5° (Fisherian statistics k = 44.2, α
95
= 5.6°, n = 16). Together with previously published results, these data indicate that the entire basin lies within the Permo-Carboniferous Reversed Superchron (PCRS). But the stratigraphically highest sample exhibits normal polarity, suggesting that the transition marking the end of the PCRS may be close. The unusual behaviour of the geodynamo that generates superchrons prompts one to ask if there are concomitant influences on the morphology of the field. The intersecting palaeomeridian method offers a means of pursuing this question. An updated analysis suggests that there are currently no compelling reasons for adding significant higher-order terms to the geocentric axial dipole (GAD) model for the Late Permian.</description><subject>Atmospheric Sciences</subject><subject>Carboniferous</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Geophysics</subject><subject>Geophysics/Geodesy</subject><subject>Magnetic fields</subject><subject>Permian</subject><subject>Stratigraphy</subject><subject>Structural Geology</subject><issn>0039-3169</issn><issn>1573-1626</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp1kE1u2zAQhYmiAeL8HCA7At1G7ZCUyKq7xEhaAy6aRbIWSGpoK7BJZSgb9SV6jtwjF6sSdZFNF4O3-d4b4GPsQsBnAWC-ZCEkQAFiPPgqi8MHNhOVUYXQUn9kMwBVF0ro-pid5PwIIIRWesb-_LSriEPKA9mhW5Ht1weeAh_WyJepfXneI7-2uYuX_JZs9PiNL7b9pvMjnWLmIdEbe4e0TcXckkuxC0hplznhHiljy_OuR_JrSpHb2L7xK0we40Cd5_Z3Zze87fq0wTN2FOwm4_m_PGUPtzf38x_F8tf3xfxqWVil6qFwWEJwXkEtnZd1qWpvHBiDWJfaSW2EFpVrTXChrkptpbGyAuOVDCUqZ9Up-zTt9pSedpiH5jHtKI4vGwGylFAJU42UmChPKWfC0PTUbS0dRqh51d5M2ptRe_OqvTmMHTl18sjGFdL75f-V_gLD8IjS</recordid><startdate>20120601</startdate><enddate>20120601</enddate><creator>Evans, Michael E.</creator><general>Springer Netherlands</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TG</scope><scope>7UA</scope><scope>7XB</scope><scope>88I</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L.G</scope><scope>M2P</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope></search><sort><creationdate>20120601</creationdate><title>Magnetostratigraphy of the Lodève Basin, France: Implications for the Permo-Carboniferous reversed superchron and the geocentric axial dipole</title><author>Evans, Michael E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a339t-be40fbc3092bc29439c7b077ee946b2671615bd7fbf9546a27a2507c32f4e3ba3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Atmospheric Sciences</topic><topic>Carboniferous</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Geophysics</topic><topic>Geophysics/Geodesy</topic><topic>Magnetic fields</topic><topic>Permian</topic><topic>Stratigraphy</topic><topic>Structural Geology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Evans, Michael E.</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>ProQuest Central Student</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection (Proquest) (PQ_SDU_P3)</collection><collection>Meteorological & Geoastrophysical Abstracts - 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The majority of the samples yield reversed polarity, with a mean of declination D = 187.4°, inclination I = −0.5° (Fisherian statistics k = 44.2, α
95
= 5.6°, n = 16). Together with previously published results, these data indicate that the entire basin lies within the Permo-Carboniferous Reversed Superchron (PCRS). But the stratigraphically highest sample exhibits normal polarity, suggesting that the transition marking the end of the PCRS may be close. The unusual behaviour of the geodynamo that generates superchrons prompts one to ask if there are concomitant influences on the morphology of the field. The intersecting palaeomeridian method offers a means of pursuing this question. An updated analysis suggests that there are currently no compelling reasons for adding significant higher-order terms to the geocentric axial dipole (GAD) model for the Late Permian.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s11200-010-0082-y</doi><tpages>10</tpages></addata></record> |
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| subjects | Atmospheric Sciences Carboniferous Earth and Environmental Science Earth Sciences Geophysics Geophysics/Geodesy Magnetic fields Permian Stratigraphy Structural Geology |
| title | Magnetostratigraphy of the Lodève Basin, France: Implications for the Permo-Carboniferous reversed superchron and the geocentric axial dipole |
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