pelozic
They are called index fossils.
It must have lived for a short geologic period of time.
An index fossil is used as an indicator of which era/epoch was preserved. The major characteristic necessary to be an index fossil include abundance, widely distributed, but lived for a short period of time.
The Cretaceous Period was the longest period of time.
an eon
yes because a single fossil is representative of a similar enough time period in history to conclude that they lived together as a group and had similar habits
7 years
Georgia Brittain.
The answer is the Basques.
it must have lived through a long span of time
yeah
It lived in the Jurassic period.