Mr. Iwahori is my best friend.

The striped shore crab is a creature often seen in rocky areas.

He likes climbing rock faces.

There is a beautiful waterfall made of artificial rock in this park.

He likes to take a walk in the park at dusk.

This mountain is mainly composed of gneiss.

He was repairing the road using a jackhammer.

This rock drill is very efficient and can quickly cut through rock.

This area is rich in breccia.

This area is rich in gabbro.