By Cyril Ponnamperuma (Eds.)
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Extra resources for Chemical Evolution of the Early Precambrian
7 billion years. III. THE EXTENT OF THE ARCHEAN RECORD IN THE SLAVE PROVINCE The Archean geology throughout the Slave Province is essen tially similar to that described above for the basinal segment east of Yellowknife, but it is not known if sedimentation and volcanism everywhere in the province were contemporaneous. 7 billion years ago (Green and Baadsgaard, 1971; R. K. Wanless, personal communication, 1975). This, then, presents a rather curious problem. The time reprsented by the Archean record as preserved at any given locali ty is very short.
37. Stockwell, C. H. 1970. Geol. 7:1213. Soc. Amer. Bull. Surv. Canad. Canad. 65:1007. Ann Rep. Econ. Windley, B. , and Bridgwater, D. 1971. Spec, Austral. 3:33. 1932, Geol. Publ. pt. C, Rep. 1:43 Geol. Soc. CARBON CONTENTS OF EARLY PRECAMBRIAN ROCKS CARLETON B. MOORE and DONNA WELCH Arizona State University, Tempe The question of whether there are detectable chemical para meters in Early Precambrian sediments or metasediments that will shed light on geochemical conditions early in the Earth's evo lutionary history is an interesting and critical one.
Franklin, J. , Frarey, M. , Robertson, J. ,, West, G. , and Young, G. M. 1972. ROGERS in In R. A. Price and R. J. W. ), Variations Tectonic Styles in Canada, pp. 335 - 380. Geological Associ ation of Canada, Toronto, Canada. Condie, K. C. 1967. Science, 155:1013. Condie, K. C , Macke, J. , and Reimer, T. 0. 1970. Geol. Soc. Amer. , 81:2759. Dickinson, W. R. 1970. Rev. Geophys. , #:813. Donaldson, J. , McGlynn, J. , and Park, J. K. 1973. In D. H. Tarling and S. K. ), Implications of Continental Drift to the Earth Sciences, Vol.