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Knauth LP, Lowe DR (1978) Oxygen isotope geochemistry of cherts from the Onverwacht group (3,4 billion years), Transvaal, South Africa, with implications for secular variations in the isotopic composition of chert. Earth Planet Sci Lett 41 209-222 Knoll AH, Hayes JM, Kaufman AJ, Swett K, Lambert IB (1986) Secular variation in carbon isotope ratios from Upper Proterozoic successions of Svalbard and East Greenland. Nature 321 832-838... [Pg.253]

See other pages where Onverwacht Group cherts is mentioned: [Pg.525] [Pg.525] [Pg.89] [Pg.94] [Pg.230] [Pg.407] [Pg.323]