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" Susquehannah rivers; and a large body of alum slate on Jackson's river, Virginia; many powerful veins of the sulphate of barytes cross it in different places; granular, as that near Fincastle, or slaty, as that in Buncomb county, North Carolina. Iron... "
Observations on the Geology of the United States of America: With Some ... - Página 57
por William Maclure - 1817 - 127 páginas
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The Edinburgh Review: Or Critical Journal, Volumen30

1818
...the Germans call Stocineerk, as at the Itad mines on New river, Wyeth ccfunty, Virginia ; the iroa disseminated in pyrites, hematitic and magnetic iron...and considerable quantities of the- sparry iron ore m beds, and disseminated in the limestone. ' p. 51. The immense basin to the west of the Allegheny...
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THE EDINBURGH REVIEW OF CRITICAL JOURNAL

DAVID WILLISON - 1818
...formation ; the lead in the form of Galena, in clusters, or what the Germans call Stockwrk, as at the laad mines on New river, Wyeth county, Virginia ; the iron...iron ore in beds, and disseminated in the limestone. ' p. 51. The immense basin to the west of the Allcghany mountains, through which so many mighty rivers...
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A Gazetteer of the State of Pennsylvania: Part First ... General Description ...

Thomas Francis Gordon - 1832 - 563 páginas
...lead are the principal metals found in this formation ; the lead, in the form of Galena, in clusters ; the iron, disseminated in pyrites, hematitic and magnetic...iron ore in beds, and disseminated in the limestone." The south-east limit of the secondary formation is bounded by the irregular and ill defined border...
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The Geographical Catechism of Pennsylvania: And the Western States; Designed ...

Israel Daniel Rupp - 1837 - 384 páginas
...lead are the principal metals found in this formation ; the lead, in the form of Galena, in clusters; the iron, disseminated in pyrites, hematitic and magnetic...iron ore in beds, and disseminated in the limestone." The Southeast limit of the secondary formation is bounded by the irregular and ill defined border of...
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Transactions, American Philosophical Society (vol. 1, 1818)

...rivers; and a large body of alum slate on Jackson's river, Virginia; many powerful veins of the sulphate of barytes cross it in different places; granular,...rocks are transition, there can be no difficulty in distinguisliing the secondary at one end and the primitive touching the other. As nature in her imperceptible...
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