According to the results of clayey water electric conductivity (EC), foraminiferous abundance and grain size analysis in the borehole CZ85 from the west coast plain of Bohai Bay, combined with the AMS14C dates, the sedimentary strata of borehole CZ85 is detailed divided into nine units from bottom to top: Unit I (40.0–33.0 m), Delta plain sediment affected by seawater; Unit II (33.0–29.4 m), lagoon sediment; Unit III (29.4–22.2 m), sediment in the intertidal zone; Unit IV(22.2–19.2 m), Delta frontal sediment; Unit V (19.2–15.8 m), Delta plain sediment; Unit VI (15.8–9.0 m), watercourse-flood plain sediment; Unit VII (9.0–8.0 m), salt marsh sediment; Unit VIII (8.0–3.6 m), tidal creek sediment; Unit IX (3.6–0.5 m), flood plain sediment. This study shows that the location of borehole CZ85 was affected by seawater twice since the Late Pleistocene:(1) The lagoon sediment from Unit II and sediment in the intertidal zone from Unit III. (2) Salt marsh sediment from Unit VII formed during 7.01-6.72 ka cal BP, which was affected by seawater, caused by the maximum period of the Holocene MIS1 transgression in the western plain of the Bohai Bay. The grain size analysis can identify the hydrodynamic events in sediment accurately, combing with clayey water electric conductivity (EC) and abundance of foraminifera is an effective method to differentiate the sedimentary facies, that compensate the lack of credibility for using a single index.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.