Question:
A geologist wants to determine both the sequence of events and the exact age of rock layers. Which combination of methods should be used?
A geologist wants to determine both the sequence of events and the exact age of rock layers. Which combination of methods should be used?
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Remember:
\[
\boxed{
\begin{aligned}
\text{Relative Dating} &\rightarrow \text{Sequence of events}
\text{Radiometric Dating} &\rightarrow \text{Numerical age}
\end{aligned}
}
\]
Updated On: Jul 24, 2026
- Only relative dating
- Only radiometric dating
- Fossil identification only
- Relative dating + radiometric dating
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Concept:
Geologists use two complementary methods to study the age of rocks:
• Relative dating determines the sequence of geological events.
• Radiometric dating determines the absolute (numerical) age of rocks.
Step 1: Understand relative dating. Relative dating establishes which rock layer is older or younger using principles such as superposition and cross-cutting relationships.
Step 2: Understand radiometric dating. Radiometric dating uses radioactive decay of isotopes to determine the actual age of rocks in years. Thus, \[ \boxed{\text{Relative dating + Radiometric dating}} \] provides both the sequence of events and the exact age. Therefore, the correct option is \[ \boxed{(D).} \]
• Relative dating determines the sequence of geological events.
• Radiometric dating determines the absolute (numerical) age of rocks.
Step 1: Understand relative dating. Relative dating establishes which rock layer is older or younger using principles such as superposition and cross-cutting relationships.
Step 2: Understand radiometric dating. Radiometric dating uses radioactive decay of isotopes to determine the actual age of rocks in years. Thus, \[ \boxed{\text{Relative dating + Radiometric dating}} \] provides both the sequence of events and the exact age. Therefore, the correct option is \[ \boxed{(D).} \]
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