Looking at the walls of the quarry up close, you notice that the grooves lean this way and that, like someone has sketched it.

The grooves are formed when magma, coming out of the volcano, cools. Hubby the geologist says that the way the grooves lean point to the coolest point. Since the grooves on each layer point in different directions, it tells you that the volcano was active many, many times.

Close up, it looks very beautiful, like artwork.

The kids were pretty enthralled too.