Radiogeology

Hydrology, hy DROL uh jee, is the study of the movement and distribution of the waters of the earth. People use billions of gallons of fresh water… See more » Geodesy, jee OD uh see, is a science that seeks to determine the size, shape, and gravitational field of the earth. It also monitors variations… See more » Bullard, Sir Edward (1907-1980), an English geophysicist, made a major contribution to the study of Earth's magnetism and the generation of heat… See more »