Book 20, Question 108
What Are Moraines, the Rubble Ridges Left by Melting Glaciers?
Moraines are rubble ridges left behind by glaciers. As a glacier moves, it carries stones, gravel, and dust. When it melts or stops, it drops everything it was carrying.
More fun facts
- Moraines are ridges of rock and dirt left by glaciers.
- Glaciers carry this rubble as they move.
- A terminal moraine forms at the front where the ice melts.
- Scientists use moraines to map where old glaciers once reached.
- They can even date when a glacier left boulders behind.
Sources: National Park Service, National Park Service, BBC
Questions kids ask
What is a terminal moraine?
It is a ridge of rock and dirt that forms at the front of a glacier where the ice melts.