. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 232 BONNIE A. MCGREGOR 3r20'N 73'2iyi 38°22'N 73°24'W 38°24'N 73»22'W. 73°20'W 38°24'N 73°Wil jrzm 38°18'N 73''20'W 38°20'N 73n8*W 38°22'N Figure 3. Track chart showing location of data. delineate the morphology of the slope in this region. The dashed track lines (Figure 3) are locations of seismic reflection profiles. An air gun with a 40-in^ chamber was used as a sound source with a Teledyne 50- element hydrophone receiver. On line A, the sound so
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 232 BONNIE A. MCGREGOR 3r20'N 73'2iyi 38°22'N 73°24'W 38°24'N 73»22'W. 73°20'W 38°24'N 73°Wil jrzm 38°18'N 73''20'W 38°20'N 73n8*W 38°22'N Figure 3. Track chart showing location of data. delineate the morphology of the slope in this region. The dashed track lines (Figure 3) are locations of seismic reflection profiles. An air gun with a 40-in^ chamber was used as a sound source with a Teledyne 50- element hydrophone receiver. On line A, the sound source consisted of two air guns with chambers 10 and 120 in^. The returning signal was filtered at 80-205-Hz frequency. Bottom samples in this integrated study are discussed by Bennett et al. (1976). The bathymetry (Figure 2) of the continental slope northeast of Wilm- ington Canyon between 500 and 1600 m has been contoured with water depths in corrected meters (Matthews, 1939). The slope has been dissected by a large valley on the northeast, as well as by several smaller valleys which, in some cases, extend down across the slope. Wilmington Canyon is just to the southwest of the survey area. The average seafloor slope is approximately 8°; however, the slope is considerably greater in the vicinity of the valleys. The broadening of the area between the 1000- and 1100-m contour is suggestive of slumping and represents the head of a large submarine slide, which is present on the slope extending as far as the valley on the northeast. From the seismic reflection profiles, the areal extent of the sediment failure as well as the internal characteristics of the slide can be determined. 878. 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 Ocean
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