The paleomagnetic record of late Quaternary secular variation from Anderson Pond, Tennessee

Details The paleomagnetic record of late Quaternary secular variation from Anderson Pond, Tennessee The paleomagnetic record of late Quaternary secular variation from Anderson Pond, Tennessee

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985e%26psl..72..219l&link_type=abstract

Earth and Planetary Science Letters, Volume 72, Issue 2-3, p. 219-237.

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Scientific paper

A paleomagnetic record of the Earth's secular variation between 12,500 and 21,000 years B.P. has been recovered from two replicate wet-sediment cores of Anderson Pond, Tennessee (36.0°N, 274.5°E). Error analysis indicates that the cores are correctly oriented in the vertical plane, but that some azimuthal offsets of individual core segments did occur. These offsets were corrected by cross-correlation between the two replicate cores. The final paleomagnetic data set is internally consistent and easily correlated with other high-resolution late Quaternary paleomagnetic records from the eastern United States. There is no evidence for any regional excursion or global reversal between 12,500 and 21,000 years B.P. Time series analysis indicates that both the field-vector and VGP distributions are non-Fisherian and distinctly ``far-sided'' compared to the axial-dipole expectation. The far-sided effect is interpreted to be geomagnetic in source rather than an error in the DRM/PDRM mechanism. Spectral analysis suggests that the secular variation is due primarily to a single irregular waveform with a period of about 3200 years. This is interpreted to result from zonal drift of the non-dipole field past Tennessee at the rate of about 0.11°/year.

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