Open AccessThe Palaeomagnetism of the Stormberg Lavas of South Africa I: Evidence for a Genuine Reversal of the Earth's Field in Triassic‐Jurassic Times
Author(s) -
Zijl J. S. V.,
Graham K. W. T.,
Hales A. L.
Publication year - 1962
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1962.tb02250.x
Subject(s) - geology , paleomagnetism , declination , earth's magnetic field , basalt , geomagnetic reversal , geophysics , paleontology , field (mathematics) , seismology , magnetic field , astronomy , physics , mathematics , quantum mechanics , pure mathematics
Summary The lowermost lavas of the Stormberg basalts are reversely magnetized and the uppermost lavas normally magnetized with a transition zone in between where the declination and inclination change progressively. Several different self‐reversal mechanisms are reviewed in the light of a variety of field and experimental evidence, all of which support the hypothesis of a genuine reversal of the main geomagnetic field during Triassic‐Jurassic times when the lavas were extruded.