Palæomagnetism of Hawaiian Lava Flows

Details Palæomagnetism of Hawaiian Lava Flows Palæomagnetism of Hawaiian Lava Flows

Nov 1961

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1961natur.192..645d&link_type=abstract

Nature, Volume 192, Issue 4803, pp. 645-646 (1961).

Physics

15

Scientific paper

PALÆOMAGNETIC investigations of volcanic rocks extruded in various parts of the world during the past several million years have generally revealed a younger sequence of lava flows magnetized nearly parallel to the field of a theoretical geocentric axial dipole, underlain by a sequence of older flows with exactly the opposite direction of remanent magnetization. A 180-degree reversal of the geomagnetic field, occurring near the middle of the Pleistocene epoch, has been inferred by many workers from such results1-3. This is a preliminary report of an investigation of 755 oriented samples collected from 152 lava flows on the island of Hawaii, selected to represent as many stratigraphic horizons as possible. (Sampling details are indicated in Table 1.) This work was undertaken because Hawaii's numerous thick sequences of lava flows, previously mapped as Pliocene to Historic by Stearns and Macdonald4, and afterwards assigned ages ranging from later Tertiary to Recent, by Macdonald and Davis5, appeared to offer an ideal opportunity to examine the most recent reversal of Earth's field.

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