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Definitions from WordNet
Noun index fossil has 1 sense
- index fossil, guide fossil - a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found
--1 is a kind of fossil
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Definitions from the Web
Index Fossil
Description:
An index fossil is a fossilized organism that is used to determine the age of the rocks or geological strata in which it is found. Index fossils are typically distinct, widely distributed, and existed for a short period of time, making them useful in the relative dating of rock layers.
Sample Sentences:
Noun:
- The discovery of the trilobite fossil served as an important index fossil for dating the surrounding rock formations.
- Index fossils provide valuable insights into the Earth's past climate and the evolution of various species.
Adjective:
- The index fossil analysis indicated that the sedimentary layer was from the Jurassic period.
- Scientists relied on the presence of index fossils to establish the relative ages of the different geological strata.
Verb:
- The paleontologist carefully indexed the discovered fossils according to their species and geological context.
- Before excavating the site, the team had to index the potential index fossils to determine the most promising locations.
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