Abstract
COMPOSITE minor intrusions were first recognized in North Wales by Beavon1, who described a series of sills between 5 and 300 ft. thick which are ccncordantly emplaced among lower Caradocian Glanrafon Slates outcropping on the eastern limb of the Arddu syncline (Fig. 1). The sills have features which characterize them as composite minor intrusions as defined by Bailey and McCallien2.
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References
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BROMLEY, A. Composite Minor Intrusions in South Eastern Snowdonia. Nature 217, 731–733 (1968). https://doi.org/10.1038/217731a0
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DOI: https://doi.org/10.1038/217731a0
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