Accession Number:

ADA172120

Title:

Shallow Sub-Bottom Reflectors in the Northeast Pacific: Distribution and Physical Properties,

Descriptive Note:

Corporate Author:

SCIENCE APPLICATIONS INTERNATIONAL CORP MCLEAN VA

Personal Author(s):

• Farrell,W. E.
• Monet,W. F.

Report Date:

1986-04-14

Pagination or Media Count:

35.0

Abstract:

This report discusses the affect the local geology and geophysics has on acoustic propagation in a region of the Northeast Pacific. Evidence for the existance of ash layers acting as significant acoustic reflectors is presented along with other physical property data i.e., roughness spectrum and sediments thickness. Regional geology, deposition models and on-land analogs of similar depositional environments presence of chert are also presented. Keywords Abyssal hill Shallow sub-bottom reflectors Thin sediments Volcanic ash Roughness.

Descriptors:

• *OCEAN BOTTOM SOILS
• *ACOUSTIC REFLECTION
• *ASHES
• THICKNESS
• MODELS
• LAYERS
• PHYSICAL PROPERTIES
• GEOLOGY
• REGIONS
• DEPOSITION
• SOUND TRANSMISSION
• THINNESS
• GEOPHYSICS
• ABYSSAL ZONES
• ROUGHNESS
• SEDIMENTS
• REFLECTORS
• NORTH PACIFIC OCEAN
• VOLCANOES
• SHALLOW DEPTH

Subject Categories:

• Physical and Dynamic Oceanography
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE