The book Elements of Chemical And Physical Geology was written by author Gustav Bischof Here you can read free online of Elements of Chemical And Physical Geology book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Elements of Chemical And Physical Geology a good or bad book?
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The physical characters of this mineral indicate decomposition. XL The same after deducting the carbonate of lime and water. XII. Red wernerite, from ArendaJ. The physical characters distinctly indicate far advanced decom- position ; the crystals are often several inches long, and are asso- ciated with hornblende in the deposits of magnetic iron ore.* XIIL Black wernerite from ArendaL This mineral was so soft that it could be penetrated to some depth by a knife ; it did not present any trace of... cleavagcf * Weibye states that the red wernerite from one of the mines appears qnite disintegrated. It is worthy of notice, that the interstices of the broken, green wernerite crystals from Krageroe are filled with compact red wernerite, for this distinctly shows that red wernerite is a product of the decomposition of the green wernerite, and that it may be removed by ^vater. The green crystals at this place are always bent or fractured, sometimes both. t Weibye states that the black colour of this wernerite arises from decom- position ; the mineral is found only in the rubbish of a mine abandoned since 1810.
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