NOVA

Five Steps of Volcanic Rock

These falls are the record of a series of volcanic eruptions that happened in this area. So we have five steps in these falls, and you can think of each of those steps, each of these layers as another volcanic eruption.

Similar Shows

WETA Passport

Stream tens of thousands of hours of your PBS and local favorites with WETA Passport whenever and wherever you want. Catch up on a single episode or binge-watch full seasons before they air on TV.