A First Book in Geology: Designed for the Use of Beginners

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D.C. Heath, 1884 - Geology - 255 pages


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Page 29 - Soils are the wreckage of the rocks, as they wear down under the action of the air, the rain and frost, the roots of plants and the stomachs of worms. This wearing has been going on for a very long time in the past, so that the soil now on any country may have gradually settled downwards for thousands of feet, as the rocks slowly rotted away and were carried off by the streams.

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