Abstract
THE authors, beginning with (A) “The different kinds of rocks treated of,” in their memoir, divide them into two groups. The first, “Silacid Ophites,” is represented by serpentinite (common at the Lizard) and other rocks, essentially composed of serpentinous minerals: it includes a sub-section, comprising peridolites and some others, all slightly hydrated. The second, “Silocarbacid Ophites,” consists of rocks, which, in addition to serpentinous minerals, contain a mineral carbonate—for example, ophi-calcite; its sub-section is represented by hemithrenes. The relation of the first group, through its subsection, to ordinary metamorphic rocks, also of the second group, through its sub-section, to carrarites and dolomites is pointed out.
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On the Origin of the Mineral, Structural, and Chemical Characters of Ophites and Related Rocks 1 . Nature 21, 529–530 (1880). https://doi.org/10.1038/021529a0
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DOI: https://doi.org/10.1038/021529a0