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Index fossil
01
指标化石, 指示化石
a fossilized organism that is useful for dating and correlating the strata in which it is found, typically indicative of a particular time period in Earth's geological history
Example
The trilobite is an index fossil commonly used to date Paleozoic rock layers.
古生代的岩层中常用三叶虫作为指标化石来进行年代测定。
Geologists rely on index fossils to determine the relative age of sedimentary rock formations.
地质学家依赖于指标化石来确定沉积岩层的相对年龄。
