There are three great rock-making processes, namely: sedimentation movements of the melted rock or rock magma from within outwards metamorphism, or transformation of rocks by
Three Classes of Rocks.—The rocks are divided into three great classes: Sedimentary rocks, made of fragments of older rocks more or less water worn or
Weathering Forces Under this head are grouped a number of agencies that have their origin in the atmosphere, and which work not only on the
Origin of Glaciers In temperate and cold climates, and even in tropical countries, where there are very high mountains, the wastage of the snow by
Forces Causing Erosion It is plain that ever since the crust of the earth became stable enough to allow water to stand, waves to form,
The Earth As a preparation for the systematic study of rocks, it will be useful to look at the earth as a whole, inquiring into
What Colonel Dwight says regarding the treatment of oxidized ores holds true also of the silver-lead smelting operations in Utah. The ore sought for was
It is strongly recommended to the student of this book that he obtain specimens of rock, not labelled, and study their features with a view
The various minerals have been described individually, so that any mineral specimen may be compared with a careful description of that mineral. The prospector’s task
The group of sulphates correspond to sulphuric acid, H2SO4. In the list of sulphate minerals, there are metals in place of the hydrogen of the