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内蒙古中部早白垩世地层发育,含植物化石较好,但经系统描述和报道的材料并不多。对固阳城西茜连脑包一带下白垩统的植物化石进行了系统采集,化石采自固阳组灰黑色泥岩以及灰绿色、黄绿色粉砂质泥岩中。在对植物化石进行系统鉴定及描述的基础上,探讨了化石植物的埋藏环境。其中保存于灰黑色泥岩中的植物化石形态较为完整,且泥岩指示弱水动力条件,因而这些化石可能为近原地埋藏;而保存于粉砂质泥岩中的化石保存较为破碎,且粉砂质泥岩表示水动力较强的环境,故这些化石可能经过水流搬运,为异地埋藏。通过以上化石的保存状态及岩性特征,可知茜连脑包一带早白垩世固阳组化石埋藏类型为近原地埋藏和异地埋藏两种,且植物化石指示较温暖湿润的古气候环境。
Early Cretaceous strata in central Inner Mongolia developed with plant fossils, but not many materials were systematically described and reported. The authors systematically collected the Lower Cretaceous plant fossils in Guyang Lixi Xinyubao area. The fossils are collected from the gray-black mudstone and the gray-green and yellow-green silty mudstone of Guyang Formation. Based on the systematic identification and description of plant fossils, the burial environment of fossil plants was discussed. Among them, the plant fossils preserved in the gray-black mudstone are relatively complete in shape and the mudstone indicates poor hydrodynamic conditions. Therefore, these fossils may be buried in near-field and the fossils preserved in the silty mudstone are relatively fragile, Mudstone represents a highly hydrodynamic environment, so these fossils may be transported by water and buried elsewhere. Based on the conservation status and lithological characteristics of the above fossils, we can see that the burial types of Fossils from the Early Cretaceous Gushanbaobao Formation in the Qianlianbaobao are two kinds of burial near-in-situ and different-burial, and the plant fossils indicate a warm and humid paleoclimate environment.