Accession Number : AD0685250

Title :   SONIC PROPERTIES OF DEEP SEA CORES FROM THE NORTH PACIFIC BASIN AND THEIR BEARING ON THE ACOUSTIC PROVINCES OF THE NORTH PACIFIC.

Descriptive Note : Technical rept. no. 10,

Corporate Author : LAMONT GEOLOGICAL OBSERVATORY PALISADES N Y

Personal Author(s) : Horn,David R. ; Horn,Barbara M. ; Delach,Marilyn N.

Report Date : DEC 1968

Pagination or Media Count : 442

Abstract : Two hundred and fifty long piston cores of deep-sea sediments from the North Pacific have been analyzed and predictions of their acoustic properties are given. Maps are included that outline submarine physiography, and the regional distribution of turbidites, volcanic ashes and sub-bottom reflecting horizons. Tentative statements are made about the reflectivity of the floor of the North Pacific based solely on a survey of bottom materials. Reliable reflectors occur within a broad zone at the periphery of the North Pacific Basin. They extend 800 miles seaward of Japan, 600 miles southeast of the Kamchatka Peninsula, 400 miles south of the Aleutian Islands, and 1100 miles due west of Oregon. A narrow zone of sub-bottom reflectors (turbidites) surrounds the Hawaiian Ridge. It is at least 80 to 135 miles wide on each side of the ridge. (Author)

Descriptors :   (*ROCK, ACOUSTIC PROPERTIES), (*OCEAN BOTTOM SAMPLING, PACIFIC OCEAN), (*UNDERWATER SOUND, PROPAGATION), SEDIMENTATION, INTERFACES, REFLECTION, ABSORPTION, ECHO RANGING, PREDICTIONS, HYDROGRAPHIC SURVEYING, SITE SELECTION, DISTRIBUTION, OCEANOGRAPHIC SHIPS, HAWAII, CLASSIFICATION

Subject Categories : Geology, Geochemistry and Mineralogy
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE