index fossil
复数形式
index fossils
1
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
- 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。
- Geologists rely on index fossils to determine the relative age of sedimentary rock formations.
地质学家依靠指标化石来确定沉积岩层的相对年龄。
- The presence of ammonite shells in a layer serves as an index fossil for the Jurassic period.
某一层中菊石壳的存在可以作为侏罗纪时期的标准化石。
- Index fossils help establish the geological timeline and the sequence of events in Earth's history.
索引化石有助于建立地质时间线和地球历史中事件的顺序。
- Studying index fossils aids in understanding evolutionary patterns and ancient ecosystems.
研究标志化石有助于理解进化模式和古代生态系统。
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