This area is rich in gabbro.

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

He attached a new bowl to the pipe.

He was observing birds using his new binoculars.

Scientists are warning that this substance is carcinogenic.

Her eyes with a large proportion of white are very impressive.

His batting eye is amazing.

He moved his eyeballs to look at me.

He was observing the distant birds with binoculars.

He doesn't take my opinion into consideration at all.