Talk:Brunhes-Matuyama reversal

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[edit] Date for this reversal?

By what dating method was this reversal event determined to have occurred?Kenny56 04:08, 27 December 2005 (UTC)

Good question. I don't know the answer. It is a common horizon across a lot of sequences, so the asnwer is probably that it occurs in some that can be very well dated. William M. Connolley 20:34, 28 December 2005 (UTC).

Can you please clarify the question? Are you interested in the dating method used to obtain the 0.78 Myr age, or the method used to determine that the reversal occured in the first place?--Octupole 21:04, 30 December 2005 (UTC)

I'm certainly interested in, "how was it first dated to 780 kyr"? By 1976 it was used (hayes imbrie shackleton) to date sediment cores; that implies it couldn't have been dated *from* sediment cores... William M. Connolley 22:10, 30 December 2005 (UTC).

The dating method used to obtain the 0.78 Myr age.Kenny56 05:54, 2 January 2006 (UTC)

I think it was dated using the K-Ar and Ar-Ar methods.Octupole 03:23, 11 February 2007 (UTC)

[edit] Effect

It would be great to have some description of the effect this had on the planet. Hyacinth 09:17, 13 January 2007 (UTC)

I'm not really sure it has one. I've spoken to ice core people who looked for it in the EPICA core, but only (I think) in terms of subtle effects. No-one seemed to be epecting anything major William M. Connolley 10:53, 13 January 2007 (UTC)