[meteorite-list] Age of Lonar Crater, India, Revised to 656 ± 81 ka

From: Paul H. <oxytropidoceras_at_meteoritecentral.com>
Date: Mon, 6 Jun 2011 8:45:44 -0500
Message-ID: <20110606094544.2XF5V.683670.imail_at_eastrmwml33>

Dear Friends,

A recent paper published online in "Geology" formally
revises the age of the Lonar Crater in India to 656 ? 81 ka

Jourdan, F., F. Moynier, C. Koeberl, and S. Eroglu, in press,
40Ar/39Ar age of the Lonar crater and consequence for the
geochronology of planetary impacts. Geology, published
online on 24 May 2011 as doi:10.1130/G31888.1
http://geology.gsapubs.org/content/early/2011/05/19/G31888.1.abstract

Jourdan, F. , F. Moynier, C. Koeberl, 2010, First 40Ar/39Ar
Age of the Lonar Crater A ~0.65 MA Impact Event? 41st
Lunar and Planetary Science Conference (2010), Abstract
no. 1661.
http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1661.pdf

?Conclusions: We propose a new impact age at 656 ?
81 ka for the Lonar crater. This age is based on 40Ar/39Ar
analyses of several samples combined in a statistically
robust global inverse isochron (MSWD =1.29; P =0.12).
This age is in accordance with the preservation state of
the crater.?

An online paper about the geology of the Lonar Crater is:

Maloof, A. C., Sarah T. Stewart, Benjamin P. Weiss, Samuel
A. Soule, Nicholas L. Swanson-Hysell, Karin L. Louzada,
Ian Garrick-Bethell, and Pascale M. Poussart, 2008,
Geology of Lonar Crater, India, Geology. vol. 122, no. 1-2,
pp. 109-126.
http://gsabulletin.gsapubs.org/content/122/1-2/109.abstract

PDf file at
http://www.princeton.edu/geosciences/people/maloof/pdf/maloof_etal08.pdf
http://web.mit.edu/iang/www/pubs/Lonar_Geology_Preprint_GSABull_submitted_2008.pdfhttp://web.mit.edu/iang/www/pubs/Lonar_Geology_Preprint_GSABull_submitted_2008.pdf

Yours,

Paul H.
Received on Mon 06 Jun 2011 09:45:44 AM PDT