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Geophysical Observations between Hawaii and Australia

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Title:Geophysical Observations between Hawaii and Australia
Authors:Johnson, G.L.
Egloff, J.
Hemler, L.G.
Date Issued:Apr 1974
Publisher:University of Hawai'i Press
Citation:Johnson GL, Egloff J, Hemler LG. 1974. Geophysical observations between Hawaii and Australia. Pac Sci 28(2): 191-205.
Abstract:A 3.5 kHz high resolution profiling system and a sparker seismic
system were utilized along a geophysical traverse from Hawaii to Australia. The
delineated sediments range from a total lack of sediment cover on the axis of Woodlark
Basin spreading center to a thick pile of biogenic debris beneath the equatorial
high productivity zone. The calcareous oozes of the western Darwin Rise and Solomon
Rise, the interbedded clays, silts, and volcanic debris of the Hawaiian Arch,
and local sediment pockets near topographic highs are discerned by the 3.5 kHz
energy source as stratified. The nonfossiliferous deep-sea lutites (red clays) and
siliceous oozes in the deeper portion of the central Pacific appear as acoustically
transparent sediments. Erosion and redeposition of sediments either in the recent
past or at the present time are apparent on the Hawaiian Arch, near the Line
Islands, in the central Pacific from 160° to 175° E, between the 2,300 and 2,400 m
isobath on the Solomon Rise and along the 4,000 m isobath in the Coral Sea.
Appears in Collections: Pacific Science Volume 28, Number 2, 1974

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