Explore "Cornwall" by Sabine Baring-Gould on Textopian. Read with annotations and highlights.
By Geology we mean the study of the rocks, and we must at the outset explain that the term _rock_ is used by the geologist without any reference to the hardness or compactness of the material to which the name is applied; thus he speaks of loose sand as a rock equally with a hard substance like granite.
Rocks are of two kinds, (1) those laid down mostly under water, (2) those due to the action of fire.