Question

A group of scientists is investigating the site of an ancient volcanic eruption. How can scientists determine whether more than one eruption occurred?
Responses
A by analyzing the order in which the different layers of ash emerged from the volcanoby analyzing the order in which the different layers of ash emerged from the volcano
B by finding the distance of the ash deposits from the volcanoby finding the distance of the ash deposits from the volcano
C by measuring the thickness of the ash depositsby measuring the thickness of the ash deposits
D by dating the ash deposits

Answer 1

A — by analyzing the order of ash layers.
Distinct, separate ash/tephra layers (law of superposition) indicate separate eruptions; radiometric or carbon dating can confirm timing, but thickness or distance alone don’t prove multiple events.