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云南省第二地质大队于1963年创名于保山栗柴坝的栗柴坝组,指云南西部保山一带上仁和桥组与泥盆系之间的一段地层。《云南省岩石地层》(1990)进行地层清理后,将上仁和桥组及栗柴坝组合并为栗柴坝组,有所扩大,但中志留统仍未有明确的划分。栗柴坝组熊洞村剖面位于云南省保山市隆阳区西邑镇,沿熊洞村西侧公路切面展布。栗柴坝组岩性为灰岩夹粉砂岩,总体上向上粒度变粗、层理变厚,为进积型层序,属高水位体系域。该组同下伏仁和桥组、上覆向阳寺组均呈整合接触。通过剖面测制,采获3层笔石等化石,化石在灰黄色粉砂岩及泥质粉砂岩中产出较为连续,中上部产出较差。该批化石的鉴定及
The Second Yunnan Geological Brigade was established in 1963 by Li Chaiba Group in Chenshan Li Chaiba, referring to a section between Renheqiao Formation and Devonian in the Baoshan area of western Yunnan. After the stratigraphy was cleared by the “Rock Formation of Yunnan Province” (1990), the Shangrenheqiao and Lichaiba combined into the Liamizha Formation, which has been expanded. However, there is still no clear division of the Central Silurian. The section of Xiongdong Village of Li Chaiba Group is located in Xiyi Town, Longyang District, Baoshan City, Yunnan Province, and is distributed along the west side of Xiongdong Village. The Lichaiba Formation lithology is limestone sandstone. Generally, the upwards grain size is coarse and the bedding is thickened. It is a progressive sedimentary sequence and belongs to a high water system tract. The group with the next under the Renhe bridge group, overlying the Xiangyang Temple group were integrated contact. Through the section test, three layers of fossils such as penoliths were obtained. The fossils were more continuous in grayish yellow siltstone and argillaceous siltstone, and the output in the middle and upper part was worse. Identification of the batch of fossils and