This area was formed by volcanic rock.

This area is rich in volcanic rock, making it an interesting place for geologists.

In my area, a summer festival is held every year.

The formation of a mountain requires millions of years.

He formed a new team.

It is said that an extinct volcano will no longer erupt.

We are planning to visit the volcanic island during summer vacation.

Mr. Okazaki is my best friend.

This room doesn't have an air hole, so it's especially hot in the summer.

I cooked a meal using quinoa.