And by "quagmire" I mean... > We know the entire exogenic carbon cycle ... underwent a −0.2 % to −0.3 % perturbation in δ13C ... [citation needed] much? And y

And by "quagmire" I mean... > We know the entire exogenic carbon cycle ... underwent a −0.2 % to −0.3 % perturbation in δ13C ... [citation needed] much? And yet, wikipedia is not standardized nor enforced for such things. Sorry for the digression.