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Index fossils

Fossils of organisms that lived during a relatively short geologic time span.

The three conditions

To be an index fossil, a fossil organism must be found throughout the world. It must be easy to identify and many fossils of that organism must exist.

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Related Questions

What 3 requirements do index fossils have?

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.


Which index fossil organism had three body segments?

scaphite


What are three conditions must a fossil meet in order to be an index fossil?

Relatively short rime span. To be an index fossil, a fossil organism must be easy to identify and many fossils of that organism must exist. You are using the 7th grade interactive reader...... Naughty naughty naughty


Describe how geologists use an index fossil and list the three characteristics of a good index fossil?

Geologists use index fossils to date the rock layers they are found in and to correlate similar rock layers in different locations. Three characteristics of a good index fossil are: widespread distribution, short duration in the geologic time scale, and easily recognizable features.


A fossil that is used to date surrounding rock layers is?

This is called an index fossil.


What three conditions must a fossil meet in order to be an index fossil?

Relatively short rime span. To be an index fossil, a fossil organism must be easy to identify and many fossils of that organism must exist. You are using the 7th grade interactive reader...... Naughty naughty naughty


What is fossils organisms that lived a short period of time called?

They are called index fossils.


What three condition must a fossil meet in order to be an index fossils?

Relatively short rime span. To be an index fossil, a fossil organism must be easy to identify and many fossils of that organism must exist. You are using the 7th grade interactive reader...... Naughty naughty naughty


What must be true for a fossil organism to be useful as a index fossil?

The absolute age of the index fossil was determine by radioactive dating or another absolute method


What two things make a fossil an index fossil?

hiii


What three conditions may a fossil meet in order to be an index fossil?

An index fossil must be widely distributed, allowing it to be found in various geographic locations. It should also have a short geological time range, meaning it existed for a relatively brief period in geological history. Lastly, an index fossil needs to be easily recognizable and distinct from other fossils, aiding in the identification of specific time periods in the geological record.


What fossil used to compare the relative ages of fossils?

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)