由于石油和天然气生存在地下一定地层层位中,而化石,特别是大化石中的标准化石又是确定地下地层层位的可靠依据,因此,一颗化石,特别是一颗大化石中的标准化石,往往对一口石油深探井会起到举足轻重的作用。可化石,特别是大化石中的标准化石,即使在野外地层剖面中往往都是极难被找到和被发 Because oil and gas survive in subterranean stratigraphic formations, and fossils, in particular the standard fossils of large fossils, are a reliable basis for determining the stratigraphy of the underground formations, the standard in a fossil, especially in a large fossil Fossils often play a decisive role in an oil exploration well. Fossils, especially the standard fossils in large fossils, are often extremely difficult to find and fatal even in the field