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1980年初,在下辽河地区采集的岩心下第三系沙河街组一段(相当于渐新世)钙质页岩中发现大量钙质微型化石。经初步鉴定,认为是属于颗石藻类(coccolith)。目前,达类微型化石在我国一些地区已陆续有所发现。据笔者所知,在台湾和西沙群岛永兴岛地区的发现有公开报道(据王崇友)。现将本次新发现的情况报道如下:本次在下辽河兴隆台106井1783米和1843米两层位钙质页岩中均发现有大量颗石藻化石。钙质页岩具明显的季节韵律结构,页理清晰,泥质层为灰褐色,钙质层为灰白色,层厚
In the early 1980s, a large amount of calcareous microfossils were found in the calcareous shale (equivalent to the Oligocene) of the Tertiary Shahejie Formation collected in the Lower Liaohe area. After preliminary identification, that is belonging to coccolith (coccolith). At present, some types of miniature fossils have been found in some areas of our country. As far as I know, the discovery in Taiwan and the Yongxing Island area of the Xisha Islands has been publicly reported (according to Wang Chongyou). The newly discovered situation is reported as follows: This time in the Lower Liaohe Xinglongtai 106 1783 meters and 1843 meters two calcareous shale are found in a large number of coccolith fossils. Calcareous shale with obvious seasonal rhythm structure, clear pages, muddy layer is brown, calcareous layer is gray, layer thickness