All Questions
Tagged with radioactivity rocks
4 questions
3
votes
0
answers
124
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What kind of rock is this? [closed]
A few years ago in Venezuela, parque nacional de Cainama, the tourist guide found and gave me this rocks, he told us that a geologist told him that those could be radioactive but no one believed him. ...
- 31
7
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4
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Why does radioactive dating work on specific rocks?
As I understand it, radioactive dating measures time by what portion of a radioactive isotope has decayed. Weren't all the natural radioactive isotopes created during the solar system's formation? So ...
- 173
1
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0
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55
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When Earth formed 4.5 × 10⁹ years ago, how much radiation did surface rocks emit?
When Earth formed $\approx 4.5 \times 10^9$ years ago, Earth's surface rocks emitted more radiation because they had more unstable isotopes. All short half-life isotopes decayed long ago, and the ...
- 141
2
votes
1
answer
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In radiometric isochron dating why is at t=0 D*/Dref=const but P/Dref not?
I am a physics graduate and trying to understand one of the assumptions made for isochron dating of rocks: at crystallization time of the rock, $t=0$, the ratio of the parent isotope to a stable ...
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