 | Josiah Dwight Whitney - 1854 - 530 Seiten
...metalliferous ores, within a crevice or fissure which had its origin in some deep-seated cause, and may be presumed to extend for an indefinite distance...connected with extensive movements of the earth's crust, and for this reason they are believed to extend indefinitely downwards; an assumption which... | |
 | Josiah Dwight Whitney - 1854 - 556 Seiten
...has been filled more or less perfectly with mineral substances ; or, in other words, an aggregation of mineral matter, accompanied by metalliferous ores,...which had its origin in some deep-seated cause, and may be presumed to extend for an indefinite distance downwards. True veins are almost universally admitted... | |
 | Iowa Geological Survey, James Hall, Josiah Dwight Whitney - 1858 - 538 Seiten
...may be divided into irregular and regular. The irregular, unstratified deposits include : igeneous eruptive masses of ore, as for instance, the iron...connected with extensive movements of the earth's crust, and for this reason they are believed to extend indefinitely downwards; an assumption which... | |
 | 1860 - 536 Seiten
...eruptive masses of ore, as for instance, the iron mountains of Lake Superior and Missouri ; stock werk deposits, or bodies of rock impregnated over an irregular...connected with extensive movements of the earth's crust, and for this reason they are believed to extend indefinitely downwards ; an assumption which... | |
 | Wisconsin. Commissioners of the Geological, Mineralogical, and Agricultural Survey - 1862 - 516 Seiten
...parallel with the stratification, and not to be depended on in depth. Gash-veins may cross the formation at any angle, but are limited to one particular group...connected with extensive movements of the earth's crust ; and for this reason they are believed to extend indefinitely downwards : an assumption which... | |
 | James Hall, J. D. Whitney - 1862 - 526 Seiten
...parallel with the stratification, and not to be depended on in depth. Gash-veins may cross the formation at any angle, but are limited to one particular group...connected with extensive movements of the earth's crust ; and for this reason they are believed to extend indefinitely downwards : an assumption which... | |
 | Josiah Dwight Whitney - 1862 - 390 Seiten
...parallel with the stratification, and not to be depended on in depth. Gash-veins may cross the formation at any angle, but are limited to one particular group...connected with extensive movements of the earth's crust; and for this reason they are believed to extend indefinitely downwards : an assumption which... | |
 | Henry Youle Hind - 1865 - 302 Seiten
...parallel with the stratification, and not to he depended on in depth. Gash-veins may cross the formation at any angle, but are limited to one particular group...a crevice or fissure, which had its origin in some deep seated cause, and which may be presumed to extend for an indefinite distance downwards."* True... | |
 | Ovando James Hollister - 1867 - 482 Seiten
...has been filled more or less perfectly with mineral substances ; or, in other words, an aggregation of mineral matter, accompanied by metalliferous ores,...which had its origin in some deep-seated cause, and may be presumed to extend for an indefinite distance downwards. True veins sometimes attain a length... | |
 | Adolph Sutro - 1868 - 256 Seiten
...which has been filled more or less perfectly with mineral snbstances, or in other words, an aggregation of mineral matter, accompanied by metalliferous ores,...which had its origin in some deep-seated cause, and may be presumed to extend for an indefinite distance downwards." According to the theory accepted by... | |
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Gash veins may cross the strata at any angle ; but are limited to one particular group of strata, and are peculiar to the unaltered sedimentary rocks. True veins are aggregations of mineral matter, accompanied by metalliferous ores, within a crevice or... 
