首页 > Term: index fossil
index fossil
A fossil that, because of its wide geographic distribution and restricted time range, can be used to identify and date the strata in which it occurs. Compare: guide fossil.
- 词性: noun
- 行业/领域: 采矿
- 类别 一般矿业; Mineral mining
- Government Agency: USBM
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创建者
- ed.young
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(Milwaukee, United States)