Above that is a picture of what is happening when the plates underneath are moving.
It shows the plates moving towards each other and rubbing against each other. This motion causes earthquakes.
The first place we wen to was Iceland. I always thought it would be icy but it is green all around. We went to the Álfagjá rift valley which is part of a boundary between Eurasian and North America Tectonic plates. Over the boundary