Accession Number:

AD0499583

Title:

Seismology. Number 9. Crustal Structure Beneath the Gulf of Maine.

Descriptive Note:

Technical rept.,

Corporate Author:

LAMONT GEOLOGICAL OBSERVATORY PALISADES NY

Personal Author(s):

• Katz, Samuel
• Edwards, Richard S.
• Press, Frank

Report Date:

1950-12-01

Pagination or Media Count:

32.0

Abstract:

Seismic refraction profiles obtained by ship-to-shore recording in the Gulf of Maine, and the velocity distribution in the upper part of the earths crust, inferred from these profiles, are described. The surface layer has a velocity of 5.34 kmsec, and extends down to a depth of 5.1 km at Falmouth, Maine. Beneath, a layer with a velocity of 6.25 kmsec is found to slope upward to the east at 3 degrees over a distance of at least 80 km. A layer with a velocity of 7.5 kmsec appears at a depth of 16.7 km at Falmouth, Maine. The unusual submarine topography beneath the course of the shot boat is illustrated. Author

Descriptors:

• (*CONTINENTAL SHELVES
• MAINE GULF)
• ECHO RANGING
• OCEAN BOTTOM TOPOGRAPHY
• VELOCITY
• SEISMIC WAVES
• SEISMOLOGICAL STATIONS
• SEISMOMETERS
• TIME
• MARINE GEOPHYSICS

Subject Categories:

• Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE