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Updated: May 3, 2025
The Fire-made Rocks, both Plutonic and Volcanic; The Water-and-Fire-made Rocks. The first of these Water-made Rocks may be subdivided into three classes. These are, I. Flint Rocks; II. Clay Rocks; III. Lime Rocks. This is not a book in which it would be wise to go closely into the mineral nature of rocks. Two or three leading thoughts may, however, be given.
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