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本文记述了河南省西南部和中部的南阳、泌阳和舞阳三凹陷下第三系核桃园组二、三段中所产的枝角类卵鞍化石Daphnia sp.,ephippium。枝角类卵鞍化石在该区尚属首次发现,因此讨论了它对该区石油地质的意义,经初步归纳有三点认识:1.枝角类卵鞍化石是确定沉积相的良好指示物;2.含枝角类卵鞍化石的岩层属季节性沉积;3.含众多枝角类卵鞍化石的岩层是良好生油岩的直观信息。
This paper describes the Daphnia sp., Ephippium produced in the second and third stages of the Lower Tertiary Hetaoyuan Formation in the southwestern and central Nanyang, Biyang and Wuyang three sags in Henan Province. Cladocera fossil saddle fossils are the first to be found in the area, so it discusses the significance of the petroleum geology in the area. There are three preliminary understandings: 1. Cladocera fossil fossils are good indicators of sedimentary facies; 2. The stratum horns of the fossil saddle fossils are seasonal sediments; 3. Stratum formations with many hornfels of the ovum fossil are informative information on good source rocks.