Abstract
REFERRING to the note anent the above which appeared in NATURE of June 9, p. 468, may I mention that these peculiar surface-features can frequently be seen upon old mortar, stucco, and calcareous sandstones, and that they are due to molecular re-arrangement of the calcium carbonate, and not to any artistic efforts on the part of prehistoric man, as is frequently supposed?
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CARUS-WILSON, C. Cup and Ring Markings. Nature 107, 523 (1921). https://doi.org/10.1038/107523b0
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DOI: https://doi.org/10.1038/107523b0
