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海拉尔盆地在大磨拐河组首次发现了介形类化石,这对于地层对比和油气勘探都有着十分重要的意义。介形类化石主要有:Limnocypridea gram-mi,Limoncypridea abscondida,Djungriac sp., Lycopterocypris.,Cypr-idea sp.等,可与蒙古克鲁伦和图格里格地区准巴音组中部、辽西九佛堂组中、上部、二连盆地巴彦花群的赛汉塔拉组上部等层位对比,其时代均属早白垩世。大磨拐河组介形类化石的发现,反映了当时的沉积环境,它的富集程度反映了有机质的富集,这是生成石油的物质基础,加上其它条件的配置,为扩大石油勘探提供了广阔的领域。
For the first time, the Mesozoic fossils were discovered in the Damaloguaihe Formation in the Hailar Basin, which is of great significance to stratigraphic correlation and oil and gas exploration. Ostracoda fossils include: Limnocypridea gram-mi, Limoncypridea abscondida, Djungriac sp., Lycopterocypris., Cypr-idea sp. In the middle and upper part of the Tang Formation, the upper strata of the Saihantala Formation in the Bayanhua Group in the Erlian Basin are all dated to the Early Cretaceous. The discovery of the Mesozoic fossils in the Damoguaihe Formation reflects the sedimentary environment of the time. Its enrichment reflects the enrichment of organic matter, which is the material basis for generating petroleum. In addition to the configuration of other conditions, in order to expand petroleum exploration Provide a vast area.