New Text book of Geology Designed for Schools And Academies
The book New Text book of Geology Designed for Schools And Academies was written by author James Dwight Dana Here you can read free online of New Text book of Geology Designed for Schools And Academies book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is New Text book of Geology Designed for Schools And Academies a good or bad book?
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Means of degradation. The principal means of degrada- tion are the following: 1. Erosion by moving waters, either those of the sea or land (pages 90, 107); 2. Erosion by ice, either that of glaciers, icebergs, or ordinary snow and ice FORMATION OF SEDIMENTARY ROCKS. 123 (page 120); 3. Pressure of the water descending into fissures; 4. Forming of substances, for example oxide of iron, in cracks, this tending to open and deepen the cracks ; 5. Growth of rootlets, roots, and trunks of trees, in cr...evices, resulting in opening and tearing apart rocks, and often producing exten- sive destruction of rocks, especially when they are jointed ; 6. Freezing of water in fissures (pa. Ge 115); 7. Chemical decomposition of one or more of the ingredients of a rock, in the course of which process the rock becomes crumbled or reduced to earth ; 8. Kemoval by solution, as of limestones by carbonated waters ; 9. Undermining of rocks by any method ; 10. Expansion and contraction by heat (page 128. ) 3. Formation of deposits The principal methods by which deposits have been formed are the following : 1.
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