Abstract
MY friend, Mr. Hudleston, in his letter on the Silurian fossils in the North-western Highlands, states very clearly a point which at the present time is of the highest importance to all students of the metamorphic rocks. If it can be proved that the Durness limestone, which contains undoubted lower Silurian fossils, is identical with the series in Western Sutherland and Ross, which Mr. Hudleston terms the quartzo-dolomitic, then the so-called “Newer Gneiss” must be more recent than it, and thus must be a metamorphosed representative of some part of the Silurian series. This would prove that very great regional metamorphism has taken place in the latter half of the Palæozoic period; and that its mineral condition will not aid us materially in determining the age of a rock which has once been stratified.
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BONNEY, T. Silurian Fossils in the North-West Highlands. Nature 25, 603–604 (1882). https://doi.org/10.1038/025603b0
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DOI: https://doi.org/10.1038/025603b0
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