A(n) _______ fossil is a fossil from a very short-lived, geographically widespread species that existed during a specific interval of geologic time.

Question

Quizplus · Accepted Answer

An index fossil is a fossil that is useful for dating and correlating the strata in which it is found. It is a species that existed for a relatively short period of time and had a wide geographic distribution, making it useful for identifying the age of rock layers in different locations. Choice A, B, C, and D are not the best choices because each term refers to a different concept than the one described in the question.

A(n) _______ Fossil Is a Fossil from a Very Short-Lived