Abstract
IN connection with Prof. J. W. Gregory's reference in NATURE of February 19, p. 667, to the discovery of the Bayuda volcanic field, and Mr. Campbell Smith's record of a riebeckite-rhyolite which constituted a number of stone implements found at Jebel Katul, in Northern Kordofan (ibid., February 26, p. 693), some further notes may be of interest.
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GRABHAM, G. Volcanic Rocks in the Anglo-Egyptian Sudan. Nature 105, 199–200 (1920). https://doi.org/10.1038/105199b0
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DOI: https://doi.org/10.1038/105199b0
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