How are rock layers used to estimate the age of fossils?
Answer and explanation
Correct answer: Fossils in lower layers are generally considered older
The governing concept is the law of superposition, which is used for relative dating. In an undisturbed sequence of sedimentary rocks, newer material is deposited above older material. Therefore, fossils in lower layers are generally older than fossils in upper layers. This does not give an exact numerical age, and folding or disturbance may alter the order; hence “always” makes option A incorrect.
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What is the correct answer to this question?
Fossils in lower layers are generally considered older
Why is this the correct answer?
The governing concept is the law of superposition, which is used for relative dating. In an undisturbed sequence of sedimentary rocks, newer material is deposited above older material. Therefore, fossils in lower layers are generally older than fossils in upper layers. This does not give an exact numerical age, and folding or disturbance may alter the order; hence “always” makes option A incorrect.
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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