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- W2355017857 abstract "Detailed foraminiferal analyses on the sediments from a 222m-long core(DY03,Fengxian, Shanghai)reveals the Late Neogene environmental changes of southern Yangtze Delta.More than 370 samples were analyzed for the whole core.However,foraminifera occurred only above 60 m and were abundant at depth intervals of 24.6—2mand 60—40 m.For the lower fossil-abundant strata, benthic foraminiferal assemblage changes from Ammonia beccarii vars.,Nonionella stella,Protelphidium tuberculatum, Elphidium advenum and Astrononion tasmanensis(60—59.2m)to Ammonia beccarii vars.,Elphidium advenum,Ammonia compressiuscula,Florilus decorus,Pseudononionella variabilis and Nonionella stella(~48.8m),and to the low abundant Ammonia beccarii vars.,Elphidium limpidum assemblage(~40m).These changes imply an environmental variation from the coast,the shallow sea and then to the coast,which indicates a marine transgression/regression sequence.Foraminiferal distribution is relatively continuous with much abundant and diverse fossils at depth intervals of 24.6—2m. A large number of Pseudononionella variabilis, Stomoloculina sp.,Heterolepaspp.and Lagena hispida occurred in the lower part 24.6—8.8m; Abundant deep-water Ammonia compressiuscula and normal salinity, warm Quinqueloculina seminula,Triloculina rotunda and Spiroloculina laevigata occurred at 8.4—5.0m;And only nearshore Ammonia beccarii vars.-Elphidium advenum assemblage was observed at 4.8—2.0 m. This variation for the upper fossil-abundant strata suggests another marine transgression/regression sequence,with a depositional environment that might have been much warmer and deeper than the lower one of the core.Regional comparison suggests that the upper and lower fossil-abundant strata(24.6—2 mand 60—40 m)in Core DY03 can be correlated with the postglacial transgression and Late Pleistocene transgression,respectively. Foraminifera and other fossils yielded in Core DY03clearly reflected the environmental and sedimentological changes within two marine transgressive-regressive sequences in the southern Yangtze Delta during the late Neogene." @default.
- W2355017857 created "2016-06-24" @default.
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- W2355017857 date "2014-01-01" @default.
- W2355017857 modified "2023-09-28" @default.
- W2355017857 title "FORAMINIFERAL RECORD OF CORE DY03AT THE SOUTHERN YANGTZE DELTA AND ITS PALEOENVIRONMENTAL IMPLICATIONS" @default.
- W2355017857 hasPublicationYear "2014" @default.
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