宁夏六盘山盆地海参1井上侏罗统—上白垩统微体化石组合
详细信息   
摘要
六盘山盆地海原凹陷肖家湾构造的海参1井钻遇中生代地层。其中安定组见孢粉化石Pinuspollenites‐Alisporites‐Araucariacites组合，时代定为晚侏罗世。和尚铺组含介形类和孢粉化石Cypridea (Cypridea)unicosta‐ta‐Cypridea(Ulwellia) koskulensis组合、Pinuspollenites‐Classopollis‐Schizaeoisporites组合和大量Peckisphaera paragranulifera，李洼峡组含轮藻和孢粉化石Aclistochara huihuibaoensis‐Mesochara cf. voluta‐Sphaerochara组合、Classopollis‐Cicatricosisporites‐Granudiscus组合和介形类Damonella cf. mediocris，Cypridea (Yumenia) sp.等，和尚铺组和李洼峡组的时代可归于早白垩世早中期(Hauterivian—Barremian)。乃家河组产轮藻化石Raskyaechara sp.，Obtusochara cf. subcylindrica等，时代可能是晚白垩世。
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