GEO101 Module 2: Lab 2
- If an isotope has a half-life of 600 million years, how old is a rock that contains the isotope after 50% of the parent has decayed?
- You discover the parent isotope in a lava flow has gone through 0.75 half-lives. If a half-life is 800 million years, how old is that rock?
- In number 1, at the beginning of the exercise, Layer F was dated at 260 million years old. Layer E was determined to be 235 million years old. When did the fold occur?
The image above shows a series of sections containing various fossils.
- If the star is 325 million years old (ma), and the heptagon (the 7-sided fossil) is 337 ma, how old is the 15-spiked fossil in between?
