This rock has existed for millions of years.

Be careful of the riptide and swim safely.

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

He likes to play the organ in the church.

He believes in the original vow of Amida Buddha and chants sutras every day.

Igneous rock is one of the main rocks that form the Earth's crust.

This area is mainly composed of conglomerate.

This area is rich in shale.

I live in Narragansett.

He is involved in the development of a railgun.