Webster 1913 Edition
γῆ, the earth +
-logy: cf. F.
The science which treats:
(a)Of the structure and mineral constitution of the globe;
(b)Of its history as regards rocks, minerals, rivers, valleys, mountains, climates, life, etc.;
(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.
Webster 1828 Edition
The doctrine or science of the structure of the earth or terraqueous globe, and of the substances which compose it; or the science of the compound minerals or aggregate substances which compose the earth, the relations which the several constituent masses bear to each other, their formation, structure, position and direction: it extends also to the various alterations and decompositions to which minerals are subject.