论文部分内容阅读
通过详细的区调工作,在四合屯、三百垄等地发现了一系列湖相枕状熔岩。研究表明,这些枕状熔岩产于同一地层层位——义县组二段,是珍稀化石沉积层中的火山岩夹层。它们除了代表一次灾变事件外,还反映出形成枕状熔岩的古湖泊接近最大湖泛期,并巨水体较深。在这种环境下,生物快速繁衍。而强烈的火山作用使得大批生物死亡,形成了现今丰富的化石组合。这些枕状熔岩的发现对于准确确定珍稀动植物化石的形成时代和环境具有重要意义。
Through detailed regional adjustment work, a series of lacustrine pillow-shaped lava has been found in Sihetun and Sanmeng. Studies show that these pillow lava are produced in the same strata - second member of Yixian Formation, which is a volcanic interlayer in rare fossil deposits. In addition to representing a catastrophic event, they also reflect that the ancient lakes forming pillow-shaped lavas are close to the maximum lagoon and have a large body of water. In this environment, biological rapid reproduction. The intense volcanic activity led to the death of a large number of organisms, forming today’s rich fossil assemblage. The discovery of these pillow-shaped lava is of great importance for accurately determining the formation age and environment of rare animal and plant fossils.