 The gneissic strata of the tract embracing this group of lead-bearing veins, seem lo 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...  American Journal of Science and Arts - Էջ 2411855Ամբողջությամբ դիտվող - Այս գրքի մասին
 | American Association for the Advancement of Science - 1856 - 384 էջ
...the red shale. " The gneissic strata of the tract embracing this group of leadbearing veins seem to differ in no essential features from the rest of the...and ferruginous hornblendic gneiss, and, thirdly, a thicker-bedded granitic gneiss, composed not unfrequently of little else than the two minerals, quartz... | |
 | 1853 - 690 էջ
...each entire lode. The yneissic strata of the tract embracing this group of leadbearing veins, seem to differ in no essential features from the rest of the...unfrequently of little else than the two minerals, quartz and felspar. Penetrating this quite diversified formation are innumerable injections of various kinds of... | |
 | 1853 - 688 էջ
...entire lode. The (jMissic strata of the tract embracing this group of leadbearing veins, seem to diifer in no essential features from the rest of the formation...unfrequently of little else than the two minerals, quartz and felspar. Penetrating this quite diversified formation are innumerable injections of various kinds of... | |
 | American Association for the Advancement of Science - 1856 - 414 էջ
...the red shale. " The gneissic strata of the tract embracing this group of leadbearing veins seem to differ in no essential features from the rest of the...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 էջ
...the red shale. " The gneissic strata of the tract embracing this group of leadbearing veins seem to differ in no essential features from the rest of the...and ferruginous hornblendic gneiss, and, thirdly, a thicker-bedded granitic gneiss, composed not unfrequently of little else than the two minerals, quartz... | |
 | 1856 - 384 էջ
...the red shale. " The gneissic strata of the tract embracing this group of leadbearing veins seem to differ in no essential features from the rest of the...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 - 962 էջ
...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... | |
 | John Lawrence Smith - 1873 - 418 էջ
...the red shale. " 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...Here, as elsewhere, they consist chiefly of soft, thinly-bedded, micaceous gneiss; a more dense and ferruginous hornblendic gneiss; and thirdly, a thicker... | |
 | John Lawrence Smith - 1873 - 408 էջ
...the red shale. "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...Here, as elsewhere, they consist chiefly of soft, thinly-bedded, micaceous gneiss; a more dense and ferruginous hornblendic gneiss; and thirdly, a thicker... | |
 | J. Peter Lesley - 1883 - 442 էջ
...entire lode. •'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 E. and W. through this belt of country. Here, as elsewhere, they consist consist chiefly of soft, thin-bedded... | |
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