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Table 3
Stable isotope data for stromatolites and nodules sampled at Créchy (CRE), Montaigu-le-Blin (MLB), Chavroches (CHA) and Gannat (GAN).
| Age | Biozone | Stromatolite | δ18OPDB | δ13CPDB | Nodules | δ18OPDB | δ13CPDB |
|---|---|---|---|---|---|---|---|
| Aquitanian | MN2 | MLB CHA |
−0.1 −0.4 |
3.3 1.3 |
(4)-MLB | −4.5 | −9.1 |
| Near the Chattian/Aquitanian boundary | MP30/MN1 | CRE (3) | −2.2 | 1.5 | (3)-CRE | −5.1 | −4.5 |
| Chattian | MP30 | GAN CRE (2) |
−2.4 −1.6 |
−3.4 −2.7 |
(2)-CRE (1)-CRE |
−4.5 −4.3 |
−5.4 −4.1 |
| MP29 | CRE (1) (average) | −2.9 | −4.2 |
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