| J.D. Dana - 1855 - 440 Seiten
...grayish-white, gray, or flesh-red color, the shade varying with the color of the constituent minerals. When it contains hornblende in place of mica, it is called...feldspathic, or quartzose, according as the mica, feJdspar, or quartz, predominates. It is called porphyritic granite, when the feldspar is in large... | |
| James Dwight Dana - 1859 - 236 Seiten
...greyish-white, grey, or flesh-red colour, the shade varying with the colour of the constituent minerals. When it contains hornblende in place of mica, it is called...brittle. Granite is said to be micaceous, feldspathic, or qvartzose, according as the mica, feldspar, or quartz predominates. It is called porphyritic granite,... | |
| Henry White - 1867 - 120 Seiten
...excess of feldspar, it assumes n redder color, aud when mica prevails it Is generally darker. When it contains hornblende in place of mica it is called...hornblende resembles mica in these rocks, but the lamina; ¡a brittle, ami innre difficult to separate. Granite is said to be micaceous, Jcl<lxp<it.t?,... | |
| James Dwight Dana - 1876 - 458 Seiten
...grayish-white, gray, or flesh-red color, the shade varying with the color of the constituent minerals. When if contains hornblende in place of mica, it is called...called porphyritic granite, when the feldspar is in )arge crystals, and appears over a worn surface like thickly scattered white blotches, often rectangular... | |
| Josiah Samuel Phillips - 1879 - 480 Seiten
...separata much less easily, and are brittle. Granite Is said to be micaceout,feld>patJiic, or quarttou, according as the mica, feldspar, or quartz predominates....blotches, often rectangular In shape. Graphic granite has the appearance of small oriental characters over the surface, owing to the angular arrangement of the... | |
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