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Abstract
Journal of Sedimentary Research, Section
B: Stratigraphy and Global Studies
Vol. 67 (1997)No.
2. (March), Pages 341-349
Development of Stratigraphy and Sediment Distribution in the Northeastern
Yellow Sea During Holocene Sea-level Rise
Hee Jun Lee (1), Suk Hoon Yoon (2)
ABSTRACT
A succession of Holocene deposits in the northeastern Yellow Sea were interpreted
in a sequence-stratigraphic context, and sedimentology of each deposit
was characterized, based on analyses of high-resolution seismic profiles
and sediment cores taken along a transect. Thin (
3 m) transgressive sediments that accumulated through shoreface erosion
during the rapid sea-level rise in the early Holocene overlie a subaerially
eroded, low-gradient, late Pleistocene platform on the present-day inner
shelf region. Cores reveal marine sands over tidal/estuarine sandy muds
with an intervening, rather indistinct ravinement surface. In the deepest
shelf area, these early Holocene tidal/estuarine deposits remain exposed
at the seabottom. In the mid o late Holocene, two contrasting deposits
of the highstand type (deltaic clayey mud and tidal sand ridges) began
to accumulate in response to slower rates of sea-level rise. A series of
tidal sand ridges in the nearshore area migrated offshore over the transgressive
sand sheet, and a deltaic watery mud prograded discordantly over consolidated
tidal/estuarine deposits in the central shelf. The transgressive facies
relationships present a model for macrotidal, epicontinental-sea settings
subject to low wave energy and reduced sediment supply.
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