What do fossils found in deeper rock layers usually indicate?
Answer and explanation
Correct answer: They may be relatively older
The relevant geological principle is superposition: in an undisturbed sequence of sedimentary rock, lower layers were generally deposited before the layers above them. Consequently, fossils preserved in deeper layers are usually relatively older than fossils in higher layers. The word “may” is important because folding, faulting and disturbance can alter the original order. Thus A is the scientifically careful answer.
Frequently asked questions
What is the correct answer to this question?
They may be relatively older
Why is this the correct answer?
The relevant geological principle is superposition: in an undisturbed sequence of sedimentary rock, lower layers were generally deposited before the layers above them. Consequently, fossils preserved in deeper layers are usually relatively older than fossils in higher layers. The word “may” is important because folding, faulting and disturbance can alter the original order. Thus A is the scientifically careful answer.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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