SECTION IV.. How Can We Estimate the Denudation Which the Igneous Rocks Have

How can we estimate the denudation which the igneous rocks have suffered?

How do faults indicate the denudation of the stratified rocks?

How do valleys indicate denudations?

Describe the instance in Scotland.

What is the evidence of denudation in the Connecticut valley? How are valleys produced?

What is the condition of the surface rock in the colder portions of the temperate zones?

With what is the surface rock generally covered?

How are soils formed?

How may soils be improved?

What is necessary to render soils fertile?