Category: Science - Earth/Agricultural/Farming
The description of rocks has fallen very much into the hands of lovers of analysis and classification, and attention has been diverted, even among geologists, from their fundamental importance as parts of the earth's crust. The geographer or the general traveller may often wis...
The description of rocks has fallen very much into the hands of lovers of analysis and classification, and attention has been diverted, even among geologists, from their fundame...
2. CHAPTER IIThe term Limestone covers, by common consent, rocks consisting mainly of calcium carbonate. Dolomite (properly Dolomite-rock), in which half or nearly half the molecules consist...
3. CHAPTER IIIThe essential characteristic of Sandstone is that it consists mainly of detrital grains of quartz, or occasionally of grains of chalcedonic silica (flint); these are found to sc...
4. CHAPTER IVThe question of what is a true _Clay_ has been much discussed, especially by agriculturists, in recent years[939]. The material, as a rock, is regarded as a massive kaolin, and,...
5. CHAPTER VIgneous rocks, those varied masses that have consolidated from a state of fusion, attracted attention in the eighteenth century through their active appearance in volcanoes. Jam...
6. CHAPTER VIUnder the term "metamorphism," considered philologically, any change may be included that is undergone by rocks after their original deposition. Van Hise, in his monumental trea...