Described is employment in four branches of earth science: geology, geophysics, meteorology, and oceanography. Considered for each employment area is the nature of the work, places of employment, type of training and qualifications for advancement, employment outlook, and earnings and working conditions. The demand for specialists in these four areas is expected to increase during the 1970's. Employment opportunities should be good, expecially for those with master's and doctor's degrees. Those geologists with only a bachelor's degree will probably face heavy competition for jobs, depending on the hiring practices of the petroleum industry. Sources of additional information are listed for each employment field, and a complete listing of the Occupational Outlook Reprint Series (for all employment areas) is included. (PR)