Abstract
Detailed paleomagnetic measurements have been made on a lava sequence exposed between altitudes of 700 to 1000 meters in the Amarkantak-Dindori tract on the eastern margin of the Deccan traps. The variation in the direction of remanent magnetism with altitude has been studied. The paleomagnetic data reveal the occurrence of a reversal of the earth's magnetic field at an altitude of about 975 meters at Amarkantak as well as the unstable behavior of the geomagnetic field near the polarity transition. These data are at variance with the observation of the same reversal of magnetic field at an altitude of about 625 meters in the paleomagnetic study of several other vertical sequences in the Deccan traps. The variance is interpreted in terms of an uplift of the Amarkantak region by about 350 meters.
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