Glaciers form in mountains and move down mountain valleys until they melt. The ice cracks during this movement down the valley . These cracks are called crevasses. Glaciers that are found in valleys and flow down old or current river valleys and move via gravity are called Outlet valley glaciers. Much smaller glaciers that form in high mountains and then flow down to the valley are called Cirque glaciers.
Alpine glaciers are where several Cirque glaciers meet.
Piedmond glaciers are very wide and form were valley glaciers join when they emerge from mountains. Place gravel and dirt in plastic shoe box and add water and food coloring one inch from top of the container. Mix the contents of the container. You may want to try layers so that the gravel is on the bottom and dirt on the top. Freeze contents of plastic shoebox one or two days to be sure glacier material is frozen.