What the Rocks Reveal -- or -- Geology Simplified

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Topics: rocks and what they add to the soil; igneous and erruptive rocks; aqueous rocks; metamorphic rocks; fossils; the work of rivers; subterranean forces; minerals; gas; salt; g ypsum; petroleum; coal; "marvellous forms of life;" great mammals; Ice Age; appearance of man; Ontario soil. Author was a Professor of Biology and Geology at the Ontario Agricultural College, Guelph. Show more