Abstract
The results of a single channel seismic reflection survey and of a micropaleontological examination of diatom remains in bottom sediment samples on the shelf and continental slope of the Peter the Great Bay area are presented. The composition and age of the sedimentary layer were studied using integrated seismic, micropaleontological and geological data. The continental slope was formed not later than at the beginning of the Early Miocene. The slope is covered with Middle Miocene-Pliocene sediments. The sedimentary thickness on most of the slope is 0.2–0.4 s. The maximum thickness (0.8–1.0 s) is observed within the areas of submarine canyons and valleys. The thickness of the Early Miocene-Pliocene sediments on the shelf is 0.2–0.4 s. On the shelf break and in a southwest-trending trough of the acoustic basement, it increases up to 1.0 s. Two uncomformities were identified in the sediments of the shelf area. The proposed age of the upper uncomformity is 10.0–8.5 My B.P.; it represents the result of a global sea level fall. The age of the lower uncomformity is unknown.
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Original Russian Text © V.N. Karnaukh, B.Ya. Karp, I.B. Tsoy, 2007, published in Okeanologiya, 2007, Vol. 47, No. 2, pp. 282–293.
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Karnaukh, V.N., Karp, B.Y. & Tsoy, I.B. Seismostratigraphy and sedimentation environment on the shelf and continental slope of Peter the Great Bay (Sea of Japan). Oceanology 47, 261–272 (2007). https://doi.org/10.1134/S0001437007020129
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DOI: https://doi.org/10.1134/S0001437007020129