Please send me a PDF of this paper.
----- Original Message -----
Sent: Monday, January 16, 2006 7:35
AM
Subject: paleonet PDF PAPER
AVAILABLE
>>>
To anyone interested I can send the following paper
>>> in PDF
form:
>>>Buoyancy control and growth rates in ammonoids: new
preliminary remarks
>>>about an old Red
Herring.
Abstract
Ammonoid preseptal cavity has been known since a
long time and often
interpreted as a possible tool for buoyancy control by
these animals. This
possiblity was firmly rejected by Jacobs (1996) who
considered the
"cartesian diver" hypothesis as a "red herring". The
present paper proposes
a re-evaluation of this problem. The relationships
between the shell
geometry, septal spacing and growth rate of the
ammonoids are also
discussed herein.
Prof Jean Guex
Institut de
Geologie
BFSH-2
1015 Lausanne
Switzerland
tel: 41 21 692
4346
fax: 41 21 692 4305
NEW E-MAIL: jean.guex@unil.ch