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. 2017 Aug 23;7:8310. doi: 10.1038/s41598-017-08234-0

Table 1.

δ13Cleaf, δ13CCO2, Δ13Cleaf and pCO2 values for the twelve studied Cretaceous stages. μ and σ correspond to mean and standard deviation, respectively.

Locality Age δ13Cleaf (‰) δ13CCO2 (‰) Δ13Cleaf (‰) pCO2 (ppm)
μ σ n μ σ μ σ μ σ
Hautrage upper lower Barremian–lower upper Barremian −27.7 0.9 30 −6.1 0.5 22.3 1.1 476.5 135.2
Uña upper Barremian −27.6 0.9 30 −5.7 0.7 22.5 1.1 502.2 155.1
Mas de la Parreta uppermost Barremian–lower Aptian −23.0 0.9 30 −5.8 0.7 17.6 1.1 191.6 37.6
El Soplao lower Albian −23.1 0.9 30 −5.0 0.3 18.6 1.0 225.6 39.4
San Just lower–middle Albian −24.9 0.8 30 −5.8 0.5 19.6 1.0 272.3 53.8
Reillo upper Albian −26.8 1.0 30 −5.8 0.3 21.6 1.1 408.9 99.0
Archingeay (A1sl–A) uppermost Albian −24.7 1.0 26 −5.7 0.4 19.5 1.1 265.8 53.3
Archingeay (A2sm1–2) lowermost Cenomanian −24.4 0.9 30 −5.9 0.4 18.9 1.0 240.9 43.9
La Buzinie uppermost lower–lowermost middle Cenomanian −23.1 0.9 30 −5.9 0.5 17.6 1.0 190.5 34.5
Infiesto upper Turonian–Coniacian −22.1 0.8 30 −5.1 0.4 17.4 0.9 185.0 30.1
Piolenc lower Santonian −26.2 1.6 17 −5.2 0.6 21.5 1.7 432.5 220.3
Belcodème upper Santonian −23.4 0.6 30 −4.8 0.5 19.1 0.8 246.0 34.5