 Saudstoiies are composed of rounded and angular grains of sand so cemented and compacted as to form a solid rock. The cementing material may be either silica, carbonate of lime, an iron oxide, or clayey matter. Upon the character of this cementing material,...  Stones for Building and Decoration - Seite 245von George Perkins Merrill - 1891 - 453 SeitenVollansicht - Über dieses Buch
 | George Perkins Merrill - 1889 - 414 Seiten
...remains unchanged. Report of National Museum, 1886,— Mer-ll. PLATE IX. M.— FRAGMENTAL ROCKS. (1) SANDSTONES, BRECCIAS, AND CONGLOMERATES. (a) COMPOSITION...architectural purposes. If silica alone is present the rock is light colored and freqnently so intensely hard that it can be worked only with great difficulty. Such... | |
 | United States National Museum - 1889 - 916 Seiten
...FBAGMENTAL EOCKS. (1) SANDSTONES, BRECCIAS, AND CONGLOMERATES, (a) COMPOSITION AUD OKIGIN. Saudstoiies are composed of rounded and angular grains of sand...architectural purposes. If silica alone is present the rock is light colored and frequently so intensely hard that it can be worked only with great difficulty. Such... | |
 | Smithsonian Institution. Board of Regents - 1889 - 908 Seiten
...CONGLOMERATES. (a) COMPOSITION AND OKIGIN. Sandstones are composed of rounded and angular grains of sand во cemented and compacted as to form a solid rock. The...architectural purposes. If silica alone is present the rock is light colored and frequently so intensely hard that it can be worked only with great difficulty. Such... | |
 | George Perkins Merrill - 1889 - 416 Seiten
...M.—FRAG MENTAL ROCKS. (1) SANDSTONES, BRECCIAS, AND CONGLOMERATES, (a) COMPOSITION AND ORIGIN. Sandstoues are composed of rounded and angular grains of sand...dependent the color of the rock and its adaptability for aichitectural purposes. lf silica alone is present the rock is light colored and frequently so intensely... | |
 | Frank Eugene Kidder - 1906 - 462 Seiten
...probably result in the production of a great quantity of the stone. 158. Sandstones. — " Sandsiones are composed of rounded and angular grains of sand so cemented and compacted together as to form a solid rock. The cementing material maybe either silica, carbonate of lime, an... | |
 | Adelbert Philo Mills - 1915 - 718 Seiten
...California, and Virginia. The foreign onyx comes largely from Algeria and Italy. 222. Sandstones. " Sandstones are composed of rounded and angular grains...carbonate of lime, an iron oxide, or clayey matter." * Sandstones vary greatly in color, hardness, and durability, but include many of the most valuable... | |
 | L. Eugene Robinson - 1919 - 406 Seiten
...Missouri and Alaska produce marble in considerable quantities. Of these, Vermont is the greatest producer. "Sandstones are composed of rounded and angular grains of sand so cemented and compacted together as to form a solid rock. The cementing material may be silica, carbonate of lime and iron... | |
 | Adelbert Philo Mills - 1926 - 456 Seiten
...in Arizona and California. The foreign onyx comes largely from Algeria and Italy. 152. Sandstones. " Sandstones are composed of rounded and angular grains...carbonate of lime, an iron oxide, or clayey matter."* Sandstones vary greatly in color, hardness, and durability, but include many of the most valuable varieties... | |
 | 1922 - 924 Seiten
...great value for interior decoration. The best stones come from Greece. Sandstones. Sandstones (qv ) are composed of rounded and angular grains of sand,...and compacted as to form a solid rock. The cementing materials are silica, oxide of iron, and carbonate of lime. Silica cement gives a white colored stone,... | |
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