1. Describe the difference between a high magnitude event and a low magnitude event. Is one more frequent than the other? Can they be used to divide geologic time scales?
2. Describe uniformitarianism and the principle of superposition. How might this be used in determining geologic time?
3. Search Google for a scientific article that discusses a past mass extinction event. How was this determined? When was the event (approximately)? What was the event that lead to the extinction? How much life died? Does the event/period have a name? Describe it. Remember to provide a reference list at the bottom of your discussion post.
(no plagiarism)
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