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An index fossil. An index fossil's age is known, allowing scientists to know the relative age of other fossils based on their position relative to the index fossil. (Ex. If a fossil is deeper in the earth, it is older than the index fossil)
They are called index fossils.
The absolute age of the index fossil was determine by radioactive dating or another absolute method
index fossils
The trilobite is the index fossil
Index Fossil
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An index fossil. An index fossil's age is known, allowing scientists to know the relative age of other fossils based on their position relative to the index fossil. (Ex. If a fossil is deeper in the earth, it is older than the index fossil)
To compare the relative ages of fossils, scientists use an early recognized species called an index fossil. An index fossil must have existed for a short period time and must have covered a wide geographical range.
They are called index fossils.
The absolute age of the index fossil was determine by radioactive dating or another absolute method
hiii
To be an index fossil, it must be widespread, commonly found (sometimes in groups) and have a short life span for which it lived. If a fossil meets all three of these requirements, it is considered an index fossil.
Trilobite
I use index cards to study my vocabulary.
index fossils
The trilobite is the index fossil