Abstract
IN a discussion on the granitic layer of the earth's crust1 Dr. P. L. Willmore criticized the P* data from near earthquakes and is reported to have remarked that, “In South Africa, a similar tendency for waves to arrive early at distances beyond 120 km. is associated with the exposure of high-velocity rock in the region where the onsets are observed”. This brief statement with regard to the South African observations may be misleading.
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References
Nature, 166, 1053 (1950).
Willmore, Hales and Gane, Bull. Seis. Soc. Amer. (in the press).
Birch and Bancroft, J. Geol., 48, 752 (1940).
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HALES, A. Crustal Layers of the Earth. Nature 168, 163–164 (1951). https://doi.org/10.1038/168163a0
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DOI: https://doi.org/10.1038/168163a0
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