- Earth science - Study of rocks - The science which treats: (a) Of the structure and mineral
constitution of the globe; structural geology. (b) Of its history as
regards rocks, minerals, rivers, valleys, mountains, climates, life,
etc.; historical geology. (c) Of the causes and methods by which its
structure, features, changes, and conditions have been produced;
dynamical geology. See Chart of The Geological Series. - A treatise on the science.