https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fullf.web&search1=R=132958
Canadian Science Publishing, 1990
Concentrates of coarse-grained detrital muscovite from the Ratcliffe Brook Formation (lowermost Cambrian) display internally discordant 40Ar/39Ar age spectra....
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