CHAPTER VII.

JOINT ACTION OF DENUDATION, UPHEAVAL, AND SUBSIDENCE IN REMODELLING THE EARTH'S
CRUST.

How we obtain an Insight at the Surface, of the Arrangement of Rocks at great
Depths.
Why the Height of the successive Strata in a given Region is so disproportionate
to their Thickness.
Computation of the average annual Amount of subaerial Denudation.
Antagonism of Volcanic Force to the Levelling Power of running Water.
How far the Transfer of Sediment from the Land to a neighbouring Sea-bottom may
affect Subterranean Movements.
Permanence of Continental and Oceanic Areas.


CHAPTER VIII.

CHRONOLOGICAL CLASSIFICATION OF ROCKS.

Aqueous, Plutonic, volcanic, and metamorphic Rocks considered chronologically.
Terms Primary, Secondary, and Tertiary; Palaeozoic, Mesozoic, and Cainozoic
explained.
On the different Ages of the aqueous Rocks.
Three principal Tests of relative Age: Superposition, Mineral Character, and
Fossils.
Change of Mineral Character and Fossils in the same continuous Formation.
Proofs that distinct Species of Animals and Plants have lived at successive