[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Pterosaur landing track
While I agree that the trackway should see more work, like Kevin I find it
more convincing as a landing trackway than as swimming prints. This might
be a good place to mention that while pterosaurs land using the same
mechanisms as birds, neither are doing a conventional steady-state 'stall'.
It would appear that both use the same unsteady process called 'full
alternating momentum reversal', which creates a flow more similar to that of
the 'fast start' mechanism in fish than to a stall.
----- Original Message -----
From: "Unwin, Dr D.M." <firstname.lastname@example.org>
Sent: Wednesday, August 19, 2009 12:50 AM
Subject: Pterosaur landing track
The pterosaur landing track paper is:
First record of a pterosaur landing trackway
Jean-Michel Mazin, Jean-Paul Billon-Bruyat and Kevin Padian
Proceedings of the Royal Society Series B.
Not sure if it is actually 'visible' yet. Anyway, when it is, I should
point out that while it would be a great find if it truly is a landing
trackway, it is also possible that it is a swim track and more work will
be needed to resolve this one way or the other.
Party Pooper Dave