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Ammonoid morphological signal versus sea-level changes

Published online by Cambridge University Press:  01 March 1997

P. NEIGE ,
D. MARCHAND  and
A. BONNOT
P. NEIGE
Affiliation:
Centre des Sciences de la Terre & UMR CNRS 5561, Université de Bourgogne, 6 boulevard Gabriel, F-21000 Dijon, France
D. MARCHAND
Affiliation:
Centre des Sciences de la Terre & UMR CNRS 5561, Université de Bourgogne, 6 boulevard Gabriel, F-21000 Dijon, France
A. BONNOT
Affiliation:
Centre des Sciences de la Terre & UMR CNRS 5561, Université de Bourgogne, 6 boulevard Gabriel, F-21000 Dijon, France
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Abstract

The morphological diversity, considered as a biological signal, of a series of four Upper Callovian (Middle Jurassic) ammonite populations of Côte-d’Or (France) is quantified. These populations fall within two third-order sequences of a second-order transgression. A sampling method that adheres as closely as possible to the morphological characteristics of the populations is established. It is valuable in that it eliminates the subjectivity related to taxonomy to allow more objective comparisons between the biological signal (shell morphology) and the physical signal (eustasy).

Type
Brief Report
Information
Geological Magazine , Volume 134 , Issue 2 , March 1997 , pp. 261 - 264
Copyright
© 1997 Cambridge University Press

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