Age of Jack Hills, Australia, Zircons Revisited
Rock around the clock: zircon crystal is oldest piece of
Earth by Reuters, The Telegraph, February 24, 2014.
Gem discovered on Australian sheep farm is oldest piece
of the planet, The Guardian, February 24, 2103.
At 4.4 Billion Years Old, Oz Crystals Confirmed As World's
Oldest, NPR, Morning Edition, February 24, 2014 3:27 AM
Rock of Ages: Microscopic 4.4 billion-year-old crystal is
the oldest-known fragment of Earth. Mail Online
Valley, J. W., A. J. Cavosie, T. Ushikubo, D. A. Reinhard,
D. F. Lawrence, D. J. Larson, P. H. Clifton, T. F. Kelly,
S. A. Wilde, D. E. Moser, and M. J. Spicuzza, 2014, Hadean
age for a post-magma-ocean zircon confirmed by atom-
probe tomography. Nature Geoscience. Published online
23 February 2014, doi:10.1038/ngeo2075