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SUMMARY Um? Y
PALAEOMAGNETIC RESULTS FROM AUSTRALIA 74
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150 oersteds 300 oersteds alternating magnetic fields alternating-field coil angle apparatus Australia axis Berrima calculated Chapter continental drift cooled Curie point curves deflection demagnetising field destructive field Devonian direction of magnetisation direction of NRM domains ferromagnetic geological geomagnetic field Geophysics given in Table grains granophyre igneous rocks ilmenite increase intensity of magnetisation intrusion laboratory magnetic cleaning magnetic minerals magnetic properties magnetisation acquired magnetometer magnetostriction mean direction measured Mount Wellington Mount Wellington Sill natural remanent magnetisation Neel Nethercote basalts netisation palaeomagnetic palaeomagnetic results Parry coils peak alternating field peak value percent Permian pole present field primary magnetisation primary TRM probably Red Hill Dyke reverse Robertson rock magnetism rock samples rotation saturation secondary magnetisation shown in Figure South Wales stable magnetisation Stacey Stott susceptibility Tasmania Tasmanian dolerite temperature Tertiary basalts tion tramway TRM acquired unmagnetised unstable variation vectors viscous magnetisation within-site Yalwal