Sedimentary rocks are seldom directly datable by radioisotopic means because: (c

Question

Sedimentary rocks are seldom directly datable by radioisotopic means because: (choose best answer) (a) they are highly radioactive, disrupting the radioisotopic "clock" of the isotopic systems used for absoulte dating, (b) they lack datable minerals that grew at the time the sediment turned to rock, (c) they form too quickly to be dated (d) as the hosts of petroleum they are too valuable to be sampled for radioisotopic dating, (e) it is too difficult to collect a sample of a sedimentary rock, (f) it is illegal to collect sedimentary rocks.

Explanation / Answer

(b) they lack datable minerals that grew at the time the sediment turned into rock.

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