. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 279. Bathymetric map of the abyssal hills study area. Isobaths are in hundreds of meters at a 200-m interval and are corrected for vertical sounding velocity according to Matthews (1939). The shaded area is underlain by sediments with the characteristics of turbidites on seismic reflection profiles; the remaining areas are underlain by a variable thickness of pelagic sediments. average separation of 13 km. The average relief from valley-to-ri
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 279. Bathymetric map of the abyssal hills study area. Isobaths are in hundreds of meters at a 200-m interval and are corrected for vertical sounding velocity according to Matthews (1939). The shaded area is underlain by sediments with the characteristics of turbidites on seismic reflection profiles; the remaining areas are underlain by a variable thickness of pelagic sediments. average separation of 13 km. The average relief from valley-to-ridge crest is 600 m ranging between depths of 4800 and 6200 m. A narrow-beam bathymetric profile shows features characteristic of cross sections of the ridges (). About 90% of the echo returns from the ridges are hyperbolic crescents generated as diffractions from peaks and edges indicating that the ridge surfaces are extremely rough relative to the wave-length of the projected acoustic pulse. The ridges exhibit two major topographic elements: a base hundreds of meters high surmounted by a superstructure of irregular peaks tens to hundreds of meters high. The slopes of the bases measured at 60 of the abyssal hills along profiles 1—11 (, A) 1078. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Atlantic Oceanographic and Meteorological Laboratories; Pacific Oceanographic Laboratories; United States. Environmental Science Services Administration. Research Laboratories; Environmental Research Laboratories (U. S. ). Washington, D. C. : U. S. Dept. of Commerce, Environmental Science Services Administration, Research Laboratories : For sale by Supt. of Docs. U. S. G. P. O.
Size: 1542px × 1620px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, bookcollectionamericana, bookleafnumber304
