Carbon dating magnetic field changes
Correcting for isotopic fractionation, as is done for all radiocarbon dates to allow comparison between results from different parts of the biosphere, gives an apparent age of about 400 years for ocean surface water.
This communication deals with the latter assumption. Recently on April 2013, the prestigious Cell Press Journal Current Biology published an article (Fu et al.
DESCRIPTION: A slightly modified version of this article (The Chronology of Geological Column: An Incomplete Tool to Search Georesources— Bhakti Niskama Shanta) published in the book ( 2013) entitled “A Revised Timescale for Human Evolution Based on Ancient Mitochondrial Genomes”.
It is fairly certain, though, that in the last 50,000 years there have been no geomagnetic reversals or global polarity excursions.
can also be produced at ground level, primarily by cosmic rays that penetrate the atmosphere as far as the earth's surface, but also by spontaneous fission of naturally occurring uranium.
bid=594&bcid=11) Title: Geo Resources Author(s) / Editor(s) : Shrivastava, K. This paper has twenty authors and they are researchers from the world’s top institutes like Max Planck Institute, Harvard, etc.