He is an expert in petrology and is in charge of geology lectures.

Last night, a mudslide occurred, and our town suffered significant damage.

Her necklace had a beautiful cat's eye stone.

He is an expert in tidology, conducting research on ocean tides.

He is majoring in tidal science.

This beautiful zoisite is part of my collection.

This drink contains carbonic acid.

This beautiful apophyllite is part of my treasure collection.

He searched the forest to find a red junglefowl.

The cumulonimbus clouds floating in the sky indicate that a thunderstorm is near.