https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fullf.web&search1=R=103503
Geological Survey of Canada, 1974
Silicified Middle Ordovician ostracodes of Whiterock to Barneveld ages occur in southwestern District of Mackenzie within a stratigraphic interval of about 3...
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