摘要
1986年以来我队在正安、道真、务川三县进行铝土矿远景调查时,在含铝岩组之下,志留系韩家店群页岩之上,发现有一层广泛分布的灰岩存在。1992年在灰岩中找到了有孔虫和(竹蜓)化石,该灰岩时代被确定为中石炭世,因其具有自身的岩石和生物组合特征,建议定名为“姚家林组”。这是贵州地层工作的一大进展。
During the geological surveying of bauxite deposits in Zhengan.Daozhen and Wuchuan counties from 1986, A widely distributed layer of limstone has been found out between Al-bearing rocks and the shales of the Hanjiadian Group of Silurian System. The fossils assemblage of Fusulinids in the limstone: Pseudostaffela sp. , Profusulinella sp. , Fusulina sp. , F. bona, etc. was found in 1992. So,the age of the limestone is considered to be Middle Carboniferous Period and the 'Yaojialin Formation 'is proposed as the name of the limestone according to the features of fossils and petrology.
出处
《贵州地质》
1993年第2期101-113,共13页
Guizhou Geology
