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Table 1

Location and corresponding biozones of the three types of samples selected for the stable isotope analysis.

Age Biozone Type of sample   

    Fish teeth beds Lacustrine limestone (nodules) Stromatolite
Aquitanian MN2a H – Montaigu-le-Blin
G – Montaigu-le-Blin
(4)-MLB Montaigu-le-Blin (MLB) Chavroches (CHA)
Oligocene/Miocene boundary MP30/MN1 F-Créchy f-Créchy (3)-CRE Créchy (CRE 3)
Chattian   MP30 VI E-e – Créchy
D-d – Créchy
B-c Créchy
A-a/b Créchy
(2)-CRE (1)-CRE Gannat (GAN) Créchy (CRE 2)
MP29 V     Créchy (CRE 1)

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