Numerical correlation of recent paleomagnetic records in two Lake Tahoe cores

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Scientific paper

Recent paleomagnetic fluctuations are smooth and well correlated in two short cores collected 28 km apart in Lake Tahoe. Cross-correlation analysis of the unit-vector time series data shows that the characteristic angular difference between the two records is only 11° for the past 3000 years. This compares favorably with the characteristic angular differences of 7-8° between adjacent samples within each core taken separately. The correspondingly high values of pairwise (between cores) and serial (within core) correlation are significant at 99.99% confidence. These data, collected and previously studied qualitatively by A.S. Goldstein, show that the sediment in Lake Tahoe can provide reliable Recent paleosecular variation records. The paucity of fine-scale paleomagnetic correlation between other cores from that basin is due likely to stratigraphic rather than rock magnetic difficulties.

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