The 1.1 Ga North American polarity asymmetry problem in the light of new data from Lake Superior and Arizona rocks

Tutkimustuotos: Artikkeli kirjassa/raportissa/konferenssijulkaisussaKonferenssiartikkeliTieteellinen

Abstrakti

Asymmetric polarities in the western arm of the Logan Loop (1070-1120 Ma) of North America are among the most widely discussed problems in Precambrian paleomagnetism. In Lake Superior rocks, a noticeable reversal asymmetry is visible only in inclination, not in declination, with normal-polarity inclinations being ca. +40° and reversed-polarity inclinations ca. -70°. This is supplemented by an even larger asymmetry observed in coeval Arizona rocks. Based on most recent data from Lake Superior and Arizona, this study uses hypotheses of non-dipolar zonal geomagnetic fields and rapid continental drift to explain the observed differences in normaland
reversed-polarity geomagnetic data during 1120-1085 Ma.
Alkuperäiskielienglanti
Otsikko2014 Nordic Supercontinent Workshop
Sivumäärä4
Julkaisupäivä2014
Sivut61-64
TilaJulkaistu - 2014
OKM-julkaisutyyppiB3 Vertaisarvioimaton artikkeli konferenssijulkaisussa
Tapahtuma2014 Nordic Supercontinent Workshop - Hurdal, Norja
Kesto: 13 lokakuuta 201419 lokakuuta 2014

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