. The Earth beneath the sea : History. Ocean bottom; Marine geophysics. SECT. 1] CONTINUOUS KEFLECTION PROFILING 65 reflectors except where it protrudes to form abyssal hills. The identity of the rough surface and the shallower layers has not been firmly established, but it seems certain that the rough surface is either the top of the deepest crustal layer having a velocity close to km/sec (sometimes called layer 3) or the top of one of the layers of intermediate velocity, to km/sec, sometimes called layer 2. In the short time we have been recording reflections continuously in the
. The Earth beneath the sea : History. Ocean bottom; Marine geophysics. SECT. 1] CONTINUOUS KEFLECTION PROFILING 65 reflectors except where it protrudes to form abyssal hills. The identity of the rough surface and the shallower layers has not been firmly established, but it seems certain that the rough surface is either the top of the deepest crustal layer having a velocity close to km/sec (sometimes called layer 3) or the top of one of the layers of intermediate velocity, to km/sec, sometimes called layer 2. In the short time we have been recording reflections continuously in the deep ocean several recordings, widely distributed in location, have shown multiple layering, as in Figs. 12, 13 and 15. One is led to wonder whether generalizations like layers I, 2 and 3 are not now over-simplified as means of classifying oceanic structures. Echo - sounding- receiver ^i^^te Ship drifting Telemetering (well logging cable) Comera ond hydroptione or source Buoyant line. Source or liydrophonc. 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 Hill, M. N. (Maurice Neville), 1919-. New York : Interscience Pub.
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom
