. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 170 G. L. SHIDELER AND D. J. P. SWIFT. Sf 120 L PROFILE 13 A? z ; o r -j ir 0 40 eo l?0 A B C IP-81 D E F (P-I3I G 1 1 1 PROFILE 12 1 1 1 1 1 1 1 f - __ -^-^- v; - _ _ "—3 sag Stratigraphic line drawings of seismic profile records: profiles 12, 13, 14, and 15. Millisecond scale illustrates two-way travel time. were identified. In ascending order, the four sequences were tentatively correlated as a Tertiary sequence (Unit A), a pre-Wiscon
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 170 G. L. SHIDELER AND D. J. P. SWIFT. Sf 120 L PROFILE 13 A? z ; o r -j ir 0 40 eo l?0 A B C IP-81 D E F (P-I3I G 1 1 1 PROFILE 12 1 1 1 1 1 1 1 f - __ -^-^- v; - _ _ "—3 sag Stratigraphic line drawings of seismic profile records: profiles 12, 13, 14, and 15. Millisecond scale illustrates two-way travel time. were identified. In ascending order, the four sequences were tentatively correlated as a Tertiary sequence (Unit A), a pre-Wisconsinan and Early Wisconsinan se- quence (Unit B), a Late Wisconsinan sequence (Unit C), and a Holocene sequence (Unit D). The nature of these assemblages throughout the present study area, as delineated by the high resolution boomer profiles (), are discussed individ- ually. In general, optimum resolution and penetration of the stratigraphic section occur along the inner shelf. However, with increasing absorption by the water column along the deeper outer shelf, resolution and penetration of the substrate are substantially reduced. Tertiary substrate The deepest sedimentary sequence detected during the study is designated Unit A, which is defined as the sequence whose upper boundary is reflector Rl, the deepest prominent acoustic discontinuity observed during the study. The absence of deep well data in the area of detection precludes a positive age deter- mination at present. However, on the basis of its structural attitude and strati- Ma/-. Geol., 12 (1972) 165-185 819. 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; Environm
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