Index fossil
01
标准化石, 指标化石
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
语法信息
有生性状态
无生命
形态构成
复合词
可数
复数形式
index fossils
例子
The trilobite is an index fossil commonly used to date Paleozoic rock layers.
三叶虫是一种标准化石，常用于测定古生代岩层的年代。
