... and crude oils of Devonian age . Organic Geochemistry , 40 , 1 – 11 , https://doi.org/10.1016/j.orggeochem.2008.10.005 McIldowie , M. and Alexander , R. 2005 . Identification of a novel C33 n-alkylcyclohexane biomarker in Permian-Triassic sediments . Organic Geochemistry , 36 , 1454...

... composition, and saturated HCs amount to <1% of the hydrocarbon fraction. n -Alkanes of the studied naphthides are a homologous series from C11 to C33. The major component of the petroleum from the Uzon caldera and the condensate from the Rainbow Springs is C18 n -alkane. In the Ngawha oil (New...

... show a bimodal distribution in this sample, with the C28-C33 n-alkanes in highest abundance and a subsidiary maximum around C16-C23, and extend out to at least C40. This n-alkane distribution is probably a function of partial biodegradation as lower molecular weight n-alkanes are more susceptible...

... of the vesicle walls, would help facilitate a better understanding of the generic relationships of the different taxa. Interestingly, Grice et al. (2005) and Hays et al. (2011) analysed the biomarkers of sediments from Greenland at the Permian–Triassic boundary, and suggested that the C33 n...