953 resultados para Davilla elliptica extract


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A large deposit of ferromanganese oxide concretions has been found in the northern portion of Lake Ontario. The concretions occur mainly in the form of coatings on sand grains but manganese nodules are present at several localities. Mineralogically, the ferromanganese oxide phases are amorphous, and their Fe and Mn contents are similar to those in concretions from other environments. However, their Ni, Co, and Cu contents are significantly higher than those reported in previously described North American lacustrine ferromanganese concretions, and this may, in part, be a reflection of their probable low rates of accumulation.

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With: Acts of Congress relating to the Union Pacific railroad and branches. Washington : J.L. Pearson, Printer, 1877. Bound together subsequent to publication.

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Delivered in 1808. The same extract was published anonymously in The Port folio, Philadelphia, Feb. 1813, p. [101]-114.