Multiple Choice
Stalagmites can be radiometrically dated because
A) like tree rings, the calcium carbonate layers vary in thickness by year.
B) carbon-14 decays to nitrogen 14 in the carbonate.
C) uranium-234 substitutes for calcium and decays to thorium-230.
D) fission tracks in apatite in the structures can be dated.
Correct Answer:
Verified
Correct Answer:
Verified
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