Question

8. Which of the following are reasons why Index fossils are chosen for determining ages of rocks? Select all that apply .

A Found commonly in rocks
B. Distributed over a very wide range
C. Are always dinosaurs
D. Limited life existence in geologic time.

Answer 1

d and b

Step-by-step explanation:

Answer 2

B. Distributed over a very wide range

D. Limited life existence in geologic time.

Step-by-step explanation:

Index fossils are very unique fossils that helps in determining the relative ages of rocks and biostratigraphic correlation. They are usually called guide fossils.

• Fossils are the preserved remains of dead organisms found in rocks.
• Index fossils are a special class of fossils with the following properties;

1. They are widely distributed.
2. They have a short stratigraphic range.
3. They show rapid evolution trends