Open AccessDOI
Physical properties of marine sediments
John E. Nafe,Charles L. Drake +1 more
TLDR
In this paper, it was shown that seafloor sediments that blanket the ocean floor are of widely varying thickness but seismic observations indicate that 200 to 400 meters in the Pacific and one kilometer in the Atlantic are fairly typical values for deep water.Abstract:
: The unconsolidated sediments that blanket the ocean floor are of widely varying thickness but seismic observations indicate that 200 to 400 meters in the Pacific and one kilometer in the Atlantic are fairly typical values for deep water. At present direct observation of these sediments is limited to such samples as may be recovered by dredging or coring operations, for drilling has been carried out only in the shallow waters of the coastal shelves. Knowledge of the physical properties of the great bulk of the sediments deeper than the few tens of feet reached by coring equipment is thus necessarily derived from geophysical observations.read more
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Moho depth structure of the eastern part of the Pyrenean belt derived from gravity data
TL;DR: In this article, a new and updated interpretation of the gravity map of the eastern part of the Pyrenean belt based on the well-established correlation existing between gravity anomalies and crustal structure is proposed.
Journal ArticleDOI
Late surge glacial conditions on Bakaninbreen, Svalbard, and implications for surge termination
Andrew Smith,Tavi Murray,Brian Davison,A. F. Clough,John Woodward,John Woodward,Hester Jiskoot,Hester Jiskoot +7 more
TL;DR: In this paper, the authors used the amplitude of the seismic reflections to detect the presence of presurge permafrost close to the glacier base, and then they combined with complementary ground-penetrating radar data to investigate the glacial structure and basal conditions.
Journal ArticleDOI
Temporal variations in gravity at Mt. Etna (Italy) associated with the 1989 and 1991 eruptions
G. Budetta,Daniele Carbone +1 more
TL;DR: In this paper, 11 microgravity surveys were conducted on Mt. Etna between 1987 and 1993, a period including the major 1989 and 1991-1993 flank eruptions and subordinate 1990 activity.
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Crustal structure in the North Cascade Mountains of Washington and British Columbia from seismic refraction measurements
TL;DR: In this article, the authors measured 15 stations along two profiles which extend from the shot point across the North Cascade Mountains of British Columbia and Washington into western Washington, and found that the average crustal thickness along azimuth 210.4° is 32 km and along 223.0° is 29 km.
Journal ArticleDOI
Sedimentary velocities of the western North Atlantic margin
R. E. Houtz,J. I. Ewing +1 more
TL;DR: In this article, the authors used seismic refraction profiles to obtain detailed sedimentary data in the western North Atlantic during the 1954 cruise of the USS San Pablo and USS Rehoboth and found that velocity gradients are variable and are greatest near the liquid-sediment interface.