Abstract
Two major stratigraphic units are present in this lower Astoria Fan drilling site. Unit 1 (0-284 m) is dominated by upper Pleistocene medium to very fine turbidite sands. Unit 2 (284-879 m) consists of upper-lower Pleistocene and Pliocene thin-bedded, fissile silty clays with graded basal silt intervals. A well-defined acoustic discontinuity on seismic reflection records corresponds approximately to the break between the two lithologic units. This discontinuity marks the base of Astoria Fan which is prograding over abyssal plain sediments. Basement depth is estimated at 911 meters or 32 meters below the bottom of the hole.
Cite
CITATION STYLE
Kulm, L. D., & von Huene, R. (1973). Site 174. In Initial Reports of the Deep Sea Drilling Project, 18. U.S. Government Printing Office. https://doi.org/10.2973/dsdp.proc.18.105.1973
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