Abstract
I HAVE lately been interested in the reply to this question given by Prof. Ramsay, and stated by Prof. Geikie in his recent edition of “Jukes's Manual of Geology” (pp. 567, 568). But the explanation, viz., that the red colour is derived from the precipitation of red (consequently anhydrous) peroxide of iron in inland seas, appears to me to give rise to this other question—Why should the precipitated peroxide be anhydrous, and not hydrous and brown, as is the case with limonite, which is found deposited in marshes, ponds, and lakes?
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A YOUNG GEOLOGIST. Why are Red Sandstones Red?. Nature 6, 142 (1872). https://doi.org/10.1038/006142c0
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DOI: https://doi.org/10.1038/006142c0
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