[meteorite-list] Age of Jack Hills, Australia, Zircons Revisited

[Paul H.]

Rock around the clock: zircon crystal is oldest piece of 
Earth by Reuters, The Telegraph, February 24, 2014.
http://www.telegraph.co.uk/news/worldnews/australiaandthepacific/10657665/Rock-around-the-clock-zircon-crystal-is-oldest-piece-of-Earth.html

Gem discovered on Australian sheep farm is oldest piece 
of the planet, The Guardian, February 24, 2103.
http://www.theguardian.com/science/2014/feb/24/gem-discovered-in-wa-is-oldest-piece-of-planet-earth

At 4.4 Billion Years Old, Oz Crystals Confirmed As World's 
Oldest, NPR, Morning Edition, February 24, 2014 3:27 AM
http://www.npr.org/2014/02/24/280888059/at-4-4-billion-years-old-oz-crystals-confirmed-as-worlds-oldest


Rock of Ages: Microscopic 4.4 billion-year-old crystal is 
the oldest-known fragment of Earth. Mail Online
http://www.dailymail.co.uk/sciencetech/article-2566588/Rock-Ages-Microscopic-4-4-billion-year-old-crystal-oldest-known-fragment-Earth.html

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
http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo2075.html

Yours,

Paul H.