Lisa J. Amstutz 
Valleys [EPUB ebook] 

All valleys are long, low cuts in the earth, but there is more to these landforms than meets the eye! While rivers form most, glaciers and splits in the Earth’s crust can form others. Some are at the bottom of the sea! Give beginning readers all the information they need to know about valleys, including their characteristics, how they form and where they can be found around the world.