[meteorite-list] recent papers on the extinction of mammoths

From: E.P. Grondine <epgrondine_at_meteoritecentral.com>
Date: Sun, 14 Feb 2010 12:16:37 -0800 (PST)
Message-ID: <782270.43276.qm_at_web36905.mail.mud.yahoo.com>

Hi Paul -

The problem with the Indiana dates is that they were calibrated using a global calibration curve, when it is now demonstrated beyond doubt that there are significant regional variations caused by some neutron sources.
It is not known if these sources were impacts or supernova.

Late dates from Pribilov would not be surprising, given the late dates from Wrangle. There could be very good explanations for these, or again they may be erroneous dates caused by some neutron source. (Perhaps one connnected with the effects of the Earth's magnetic field, but who knows?)

E.P. Grondine
Man and Impact in the Americas


      
Received on Sun 14 Feb 2010 03:16:37 PM PST