We submitted a petition to the mayor for the improvement of the park.

We petitioned the mayor for improvements to the park.

This mountain is mainly composed of conglomerate.

This area is rich in breccia.

This rock is jyamongan, in other words, serpentinite.

This building is made of granite.

In this area, you can see a lot of sedimentary rocks.

This mountain is made of igneous rock.

Smoking is considered a cause of carcinogenesis.

This area is rich in pitchstone.