The photograph shows a basalt rock formation in Vik, Iceland.
Basalt is an igneous rock. What does the presence of this rock formation tell us about the history of this part of Earth?
The bricks used to build this wall are made of sandstone.
What type of rock is sandstone?
The Wave is a rock formation in Arizona. It was formed from shifting sands from the desert during the Jurassic period and was later eroded by water and wind.
What type of rock is the Wave made out of?