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Late Quaternary Transgressive Stratigraphy and its Depositional History in the Southeastern Continental Shelf, Korea  

Yoo, Dong-Geun (Petroleum and Marine Resources Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Lee, Chi-Won (Petroleum and Marine Resources Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Kim, Seong-Pil (Petroleum and Marine Resources Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Park, Soo-Chul (Department of Oceanography, Chungnam National University)
Publication Information
Geophysics and Geophysical Exploration / v.13, no.4, 2010 , pp. 349-356 More about this Journal
Abstract
Analysis of high-resolution seismic profiles acquired from the southeastern continental shelf of Korea reveals that the late Quaternary transgressive deposits consist of six seismic units created in response to sea-level rise. These units with different seismic facies and geometry can be grouped into two distinct depositional wedges (paralic and marine) bounded by a ravinement surface. The paralic component underlying the ravinement surface consists of the sediment preserved from shoreface erosion and contains incised-channel fill, ancient beach-shoreface deposit and estuarine deposit. The top of paralic unit is truncated by a ravinement surface and overlain by marine component. The marine component consists of the sediment produced through shoreface erosion during landward transgression and contains mid-shelf sand sheet, mid-shelf sand ridge and inner shelf sand sheet. Such transgressive stratigraphic architecture of six sedimentary units is controlled by a function of lateral changes in the balance among rates of relative sea-level rise, sediment input and marine processes at any given time.
Keywords
Late Quaternary; Transgressive systems tract; Sea-level change; Korea Strait;
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