A stone run is like a big pile of rocks that were moved by a powerful force a long, long time ago. It's kind of like when you build a tower out of blocks, but on a much bigger scale! Imagine if the blocks were actually big rocks and they were moved by something really strong like a glacier or a landslide. When the rocks moved, they might have crashed into each other and created a big mess, which is what a stone run looks like today. Stone runs can be found all over the world, and scientists study them to learn more about how the earth has changed over time. Pretty cool, huh?