Abstract
BANDED flints have long been known to occur in small numbers together with ordinary flints, which are the nodules of chalcedonic silica found in the chalk (Upper Cretaceous) of England and elsewhere. The bands may be observed on fractured surfaces and show up as a variation in colour within the normal colour range of unbanded flints. The exterior of the affected nodule may be ridged in a pattern conformable to the banding.
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JOCELYN, J. Banded Flints. Nature 216, 781–782 (1967). https://doi.org/10.1038/216781b0
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DOI: https://doi.org/10.1038/216781b0
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