What are glacier grooves?

Glacier grooves are long, shiny scratches on rocks that glaciers leave behind like a giant ice pencil.

Imagine you're wearing a really big, smooth pair of socks and you walk across the floor, your socks would make long lines on the floor. That's kind of what happens with glacier grooves. A glacier is like a huge, slow-moving river of ice. As it moves, it carries rock pieces inside it, like tiny pebbles in a snow globe.

When the glacier slides over a rock, those pebbles scratch the rock, just like how your socks make lines on the floor. Over many years, these scratches become deep and long, and they're called glacier grooves.

Sometimes, when the ice melts away, you can see these grooves clearly, it's like looking at a message written by nature!

If you ever touch a rock that has lots of long lines on it, you might be touching a glacier groove, left behind by an ancient, slow-moving giant!