The “Satin Spar” of Alston in Cumberland; and the Determination of Massive and Fibrosus Calcites and Aragonites
- 1 May 1897
- journal article
- Published by Mineralogical Society in Mineralogical Magazine and Journal of the Mineralogical Society
- Vol. 11 (52) , 184-187
- https://doi.org/10.1180/minmag.1897.011.52.05
Abstract
Owing to the fact that aragonite frequently occurs in fibrous aggregations, as in "flos ferri,' it seems to have been sometimes assumed that all fibrous specimens of calcium carbonate are aragonite.On these grounds the " satin spar" from Mston Moor in Cumberland is often referied to aragonite, although it has more than once been shown to be really calcite. Miller refers to it under aragonite, as being from "Dufton in Cumberland, '' saying that it contains 4.25 per cent. of manganese carbonate: these figures are those given by J. Holme in a very crude analysis of the satin spar of Alston.Keywords
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