Abstract
IN collaboration with Prof. A. Holmes, I have already published estimates of the ages of the Whin Sill and the Cleveland Dyke based on the helium ratios of these rocks (NATURE, May 25, 1929, p. 794). We came to the conclusion that the method offers great scope for the correlation of fine-grained basic igneous rocks when direct geological evidence is lacking.
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DUBEY, V. Helium Ratios of the Basic Rocks of the Gwalior Series. Nature 126, 807 (1930). https://doi.org/10.1038/126807a0
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DOI: https://doi.org/10.1038/126807a0
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