The Precambrian: the Archean and Proterozoic eons
Robb, Laurence J., Knoll, Andrew H., Plumb, Kenneth A., Shields, Graham A., Strauss, Harald, and Veizer, Jan (2004) The Precambrian: the Archean and Proterozoic eons. In: Gradstein, Felix M., Ogg, James G., and Smith, Alan G., (eds.) A Geologic Time Scale 2004. Cambridge University Press, Cambridge, UK, pp. 129-140.
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Archean and Proterozoic time scales are currently defined chrono-metrically, with subdivisions into eras and periods being defined and allocated boundaries in terms of a round number of millions of years before present. Isotope stratigraphy is increasingly used to identify tectonic, chemical, and biological changes. The Neoproterozoic Era is characterized by at least two, and possibly four, severe and extensive glaciogenic events; for this era, chronostratigraphic subdivisions following established Phanerozoic practices are possible.
|Item Type:||Book Chapter (Research - B1)|
|Date Deposited:||28 Jan 2010 04:52|
|FoR Codes:||04 EARTH SCIENCES > 0402 Geochemistry > 040299 Geochemistry not elsewhere classified @ 100%|
|SEO Codes:||97 EXPANDING KNOWLEDGE > 970104 Expanding Knowledge in the Earth Sciences @ 100%|