Number of people employed in Texas: 7,810

What they do, according to O*NET: They study the composition, structure, and other physical aspects of the Earth. May use geological, physics, and mathematics knowledge in the exploration for oil, gas, minerals, or underground water; or in waste disposal, land reclamation, or other environmental problems. May study the Earth’s internal composition, atmospheres, oceans, and its magnetic, electrical, and gravitational forces. Includes mineralogists, crystallographers, paleontologists, stratigraphers, geodesists, and seismologists.

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