Question

Mass extinctionsa. are an example of 'uniformitarian' principles in geology b. are often triggered by magnetic field c. reversals occur at regularly spaced intervals in the geologic record d. denote a relatively sudden, global decrease in the diversity of life forms. e. are usually caused by a tsunami

Answer 1

Answer: d. denote a relatively sudden, global decrease in the diversity of life forms.

Step-by-step explanation: