This area is rich in peridotite.

The hyrax lives in the rocky areas of Africa and the Middle East.

This mountain is mainly composed of quartzite.

This mountain is made of phonolite.

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

Well then, I'm off.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

This motor is very efficient.

The time has come for his plan to be approved.

He used a loudspeaker to convey his message to a large crowd.