Lead Vein in Lias, Glamorganshire.
Gold in Russia, California, and Australia.
Connection of hot Springs and mineral Veins.


INDEX.

...


STUDENT'S ELEMENTS OF GEOLOGY.


CHAPTER I.

ON THE DIFFERENT CLASSES OF ROCKS.

Geology defined.
Successive Formation of the Earth's Crust.
Classification of Rocks according to their Origin and Age.
Aqueous Rocks.
Their Stratification and imbedded Fossils.
Volcanic Rocks, with and without Cones and Craters.
Plutonic Rocks, and their Relation to the Volcanic.
Metamorphic Rocks, and their probable Origin.
The term Primitive, why erroneously applied to the Crystalline Formations.
Leading Division of the Work.

Of what materials is the earth composed, and in what manner are these materials
arranged? These are the first inquiries with which Geology is occupied, a