Ge*ol"o*gy (?), n.; pl. Geologies (#). [Gr. , , the earth + -logy: cf. F. g'eologie.]
1.
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.
2.
A treatise on the science.
© Webster 1913.