Which rock type is most commonly used for radiometric dating to estimate the Earth’s age?
Options
A
Igneous rock
B
Metamorphic rock
C
Sedimentary rock
D
Organic rock
Answer & Analysis
Answer
A
Analysis
Igneous rocks, formed from the cooling and solidification of magma or lava, are best for radiometric dating. They contain minerals that incorporate radioactive isotopes, making them useful for estimating the Earth’s age.
For B: Metamorphic rock: Metamorphic rocks have been altered by heat and pressure, which can disturb isotopic ratios, making them less reliable for dating the Earth’s age.
Click "Show Answer" to reveal the answer and analysis
Want More Practice Questions?
Access thousands of practice questions with detailed explanations on Scholardog.