Elementary Geology With Special Reference to Canada
The book Elementary Geology With Special Reference to Canada was written by author A P Arthur Philemon Coleman Here you can read free online of Elementary Geology With Special Reference to Canada book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Elementary Geology With Special Reference to Canada a good or bad book?
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" APATITE. A compound of lime, phosphoric acid, and fluorine. Crystals hexagonal, often with well-developed six- sided prisms; lustre vitreous to resinous; colour usually greenish, sometimes reddish or otherwise tinted; streak colourless; hardness 5; specific gravity about 3; brittle. This mineral is important as a source of phosphorus and phosphoric acid; it occurs in eastern Ontario and in Quebec north of the Ottawa river. AGATE. Water containing silica in solution sometimes deposits that sub...stance on the walls of cavities in certain of the igneous rocks. Eventually the cavity is wholly or par- tially filled with silica, arranged in a concentric manner and presenting delicate and varying shades of colour. Silica in this form is known as agate. JASPER. This mineral is also a form of silica to which a bright red colour is given by the presence of oxide of iron. CHROMITE. Also known as chromic iron ore. A compound of iron, chromium, and oxygen. Crystals cubic system; lustre sub-metallic; colour iron-black or brownish black; streak brown; hardness 5-5; specific gravity about 4-4; brittle.
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