Earth Features and Their Meaning An Introduction to Geology for the Student and the General Reader
CHAPTER III
THE NATURE OF THE MATERIALS IN THE LITHOSPHERE
The rigid quality of our planet—Probable composition of the earth’s core—The earth a magnet—The chemical constitution of the earth’s surface shell—The essential nature of crystals—The lithosphere a complex of interlocking crystals—Some properties of natural crystals, minerals—The alterations of minerals—Reading references 20