Abstract
AGE determinations have been carried out on muscovite from the Weardale Granite1 by both the rubidium–strontium and potassium–argon methods. One specimen from a depth of 1,396 ft. in the borehole was measured by both methods, while another from 1,314 ft. was measured by the potassium–argon method only.
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DODSON, M., MOORBATH, S. Isotopic Ages of the Weardale Granite. Nature 190, 900 (1961). https://doi.org/10.1038/190900a0
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DOI: https://doi.org/10.1038/190900a0
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