%0 Journal Article
%T BURIED WEATHERING LAYERS OF THE LATE QUATERNARY AND THEIR ENVIRONMENTAL SIGNIFICANCE IN THE ZHUJIANG RIVER ESTUARY<br>珠江口晚第四纪埋藏风化层及其环境意义*
%A Huang Zhenguo
%A Cai Fuxiang
%A <br>黄镇国
%A 蔡福祥
%J 第四纪研究
%D 2007
%I 
%X The weathering layer is an obvious index for sedimentary discontinuity and change of environment. The buried weathering layers of the Late Quaternary can be recognized not only in the plain of the Zhujiang Delta but also in the sea area of the estuary of Zhujiang River. The datings of four samples from two cores in the sea area of Wai Lingding Island at the Zhujiang River estuary show that there are generally two weathering layers in the profiles of Late Quaternary since MIS 3. The lower layer is dated about 31060 - 28754aB. P., belonging to MIS 3 and the upper layer 14320 - 11500aB. P., belonging to MIS 2. The lithology of weathering layers, including clay, sandy clay, fine-medium sands and sand-pebbles, etc., varies from place to place. The colour of weathering layers appears reddish brown, brownish, or mottled. The analysis of oxide of four samples from the two cores shows that the weathering intensity of the upper layer is stronger than that of the lower. The diatom analysis of one core shows that the two weathering layers are mainly weathered from terrestrial sediments, showing two depositional cycles from terrestrial to marine during MIS 3 and MIS 2 respectively.
%K weathering layer
%K Late Quaternary
%K Zhujiang estuary<br>风化层
%K 晚第四纪
%K 珠江口
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=EA07051745CDC8D89D5F01A3A4CFE6A9&aid=31BA18BDF4F29C39&yid=A732AF04DDA03BB3&vid=DB817633AA4F79B9&iid=94C357A881DFC066&sid=E0FF0FB27B45F84E&eid=07034C6B9EA4A53C&journal_id=1001-7410&journal_name=第四纪研究&referenced_num=3&reference_num=14