FONT-SIZE: 14pt; mso-font-kerning: 18.0pt; mso-bidi-font-weight: bold" lang=EN-US>face="Times New Roman">Bei’an Formation——A New Lithostratigraphic Unit of Carboniferous in the fix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />Liuzhou Area, Guangxi, China fix = o ns = "urn:schemas-microsoft-com:office:office" />
摘要
FONT-FAMILY: ’Times New Roman’; FONT-SIZE: 14pt; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang=EN-US>Around the fix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />Liuzhou area of Guangxi, China, the so-called “Huangjin Formation” refers to the strata between Carboniferous Luzhai Formation and “Simen Formation”, while they are remarkably different to the typical Huangjin Formation in the type area in terms of lithology, lithofacies and paleo-geographic position. Based on the study as well as published literature, Bei’an Formation, a new lithologic unit is established to denote the sediments that were assigned to the “Huangjin” Formation. This Bei’an Formation is widely exposed in the areas of Liuzhou, Liujiang, Luzhai, Liucheng, Huanjiang in northern and central Guangxi. The Bei’an Formation represents a succession of basin and slope sediments, and mainly comprises gray or dark gray, thin to thick-bedded packed biomicrites and fossiliferous biomicrites, with intercalations of siliceous rocks, mudstones and sandstones.