Question

A widespread fossil that existed for a short period of time and is used to date rocks is called a(n)

Answer options with 5 options
A.
trace fossil.

B.
index fossil.

C.
cast fossil.

D.
mold fossil.

E.
imprint fossil.

Answer 1

The correct answer is B. index fossil.

Index fossils are used by geologists and paleontologists to date the age of rock layers because they were widespread and existed for a relatively short geological period, making them useful for correlating the ages of the rocks in different locations.