 The gneissic strata of the tract embracing this group of lead-bearing veins, seem to differ in no essential features from the rest of the formation ranging eastward and westward through this belt of country. Here, as elsewhere, they consist chiefly of...  Original Researches in Mineralogy and Chemistry - 第 179 頁John Lawrence Smith 著 - 1884 - 630 頁完整檢視 - 關於此書
 | 1855 - 490 頁
...westward through this belt of country. Here, as elsewhere, they consist chiefly of soft thinly bedded micaceous gneiss, a more dense and ferruginous hornblendic...innumerable injections of various kinds of granite, greenstone trap, and other genuine igneous rocks. The granites, as throughout this region generally,... | |
 | 1855 - 990 頁
...westward through this belt of country. Here, as elsewhere, they consist chiefly of soft thinly bedded micaceous gneiss, a more dense and ferruginous hornblendic...innumerable injections of various kinds of granite, greenstone trap, and other genuine igneous rocks. The granites, as throughout this region generally,... | |
 | American Association for the Advancement of Science - 1856 - 384 頁
...westward through this belt of country. Here, as elsewhere, they consist chiefly of soft thinly bedded micaceous gneiss, a more dense and ferruginous hornblendic gneiss, and, thirdly, a thicker-bedded granitic gneiss, composed not unfrequently of little else than the two minerals, quartz... | |
 | 1853 - 690 頁
...westward through this belt of country. Here, as elsewhere, they consist chiefly of soft thinly bedded micaceous gneiss, a more dense and ferruginous hornblendic...unfrequently of little else than the two minerals, quartz and felspar. Penetrating this quite diversified formation are innumerable injections of various kinds of... | |
 | 1855 - 484 頁
...westward through this belt of country. Here, as elsewhere, they consist chiefly of soft thinly bedded micaceous gneiss, a more dense and ferruginous hornblendic...innumerable injections of various kinds of granite, greenstone trap, and other genuine igneous rocks. The granites, as throughout this region generally,... | |
 | American Association for the Advancement of Science - 1856 - 962 頁
...bedded micaceous gneiss, a more dense and ferruginous hornblendic gneiss, and, thirdly, a thicker-bedded granitic gneiss, composed not unfrequently of little...feldspar. " Penetrating this quite diversified formation arc innumerable injections of various kinds of granite, greenstone trap, and other genuine igneous... | |
 | American Association for the Advancement of Science - 1856 - 414 頁
...westward through this belt of country. Here, as elsewhere, they consist chiefly of soft thinly bedded micaceous gneiss, a more dense and ferruginous hornblendic gneiss, and, thirdly, a thicker-bedded granitic gneiss, composed not unfrequently of little else than the two minerals, quartz... | |
 | American Association for the Advancement of Science - 1856 - 964 頁
...westward through this belt of country. Here, as elsewhere, they consist chiefly of soft thinly bedded micaceous gneiss, a more dense and ferruginous hornblendic gneiss, and, thirdly, a thicker-bedded granitic gneiss, composed not unfrequently of little else than the two minerals, quartz... | |
 | 1856 - 384 頁
...westward through this belt of country. Here, as elsewhere, they consist chiefly of soft thinly bedded micaceous gneiss, a more dense and ferruginous hornblendic gneiss, and, thirdly, a thicker-bedded granitic gneiss, composed not unfrequently of little else than the two minerals, quartz... | |
 | John Lawrence Smith - 1873 - 418 頁
...perhaps in a rather larger relative amount in the copper-bearing lodes of the red shale. " The gneissic strata of the tract embracing this group of lead-bearing...a coarse binary mixture of quartz and opaque white felflspar, tending easily to decomposition. This rock abounds in the form of dykes and veins, sometimes... | |
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