A person who studies the formation of the earth

A person who studies the formation of the earth Correct Answer Geologist

One word substitute is Geologist.

Meteorologist: an expert in or student of meteorology; a weather forecaster.
Anthropologist: an expert in or student of anthropology.
Geologist: an expert in or student of geology.
Seismologist: scientists who study earthquakes and planetary activities as well as their effects, such as tsunamis.

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A person who studies the formation of the earth .