Liu Cl, Fürsich F, Dong Yx, Che XG, Zhuang C (2008)
Publication Language: English
Publication Type: Journal article
Publication year: 2008
Book Volume: 10
Pages Range: 313-323
A high resolution study has been carried out on the sediments and ostracod faunas of borehole PRD05 drilled near the Xijiang inlet in the Pearl River Delta area. The analytical results suggest that the interplay between sea level fluctuations and river processes led to the environmental changes in the study area during the Late Quaternary. A fluvial environment began to develop before 26600{a BP}. Coarse-grained sediments at the bottom of the core indicate a very high energy condition. The reduction of grain size upwards implies a decrease of energy and fluvial overbank was developed. Between 26600 and 13400{a BP},the environment was characterized by a flood plain. The upper part of the fluvial sediments experienced weathering and erosion during the last maximum glacial episode and was changed to the variegated clay. The postglacial transgression occurred around 13400{a BP}. In the first phase of transgression,a marsh environment dominated in the study area. At around 9000{a BP},the rate of sea level rise rapidly increased and an estuary environment with marine-brackish ostracod faunas continuously existed until 4850{a BP}. Three second-order sea level fluctuations can be recognized based on the composition and abundance of ostracods. The maximum transgression occurred between 7500 and 7140{a BP},evidenced by the highest diversity and abundance of ostracods in the borehole. Since 4850{a BP},a regressive trend was recorded in the borehole. The environment gradually changed into a deltaic plain with the increased influence of river processes.
APA:
Liu, C.-l., Fürsich, F., Dong, Y.-x., Che, X.-G., & Zhuang, C. (2008). High resolution ostracod records of borehole PRD05 and the late Quaternary palaeoenvironment in Pearl River Delta. Journal of Palaeogeography, 10, 313-323.
MLA:
Liu, Chun-lian, et al. "High resolution ostracod records of borehole PRD05 and the late Quaternary palaeoenvironment in Pearl River Delta." Journal of Palaeogeography 10 (2008): 313-323.
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