An extensive and satisfying survey by a recognized non-fiction writer, this seems a better coverage than Carroll and Mildred Fenton's first geology books and about equal in content to Rocks, Rivers and the Changing Earth, by Nina and Herman Schneider. It starts with rocks as the source of a great percentage of the Earth's materials, and the early thoughts about rock formation- Werner's layer theory and Hutton's more advanced one that rocks are made and unmade by a variety of interactions. Following chapters discuss the different kinds of rock- from pebbles to mountains- what they contain and how they are formed. Boulders, falling rock, volcanoes, sea floor sediment, identifying minerals, granite, salt, and fossil containing rock are a few of the other topics that give us a friendly introduction to geology here.
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