F. Kenig et al., Distribution and origin of ethyl-branched alkanes in a Cenomanian transgressive shale of the Western Interior Seaway (USA), ORG GEOCHEM, 32(7), 2001, pp. 949-954
Monoethylalkanes (MEA, C-16-C-22) With an even number of carbon atoms are r
elatively abundant in the saturated hydrocarbon fraction of the basal Grane
ros Shale (Cenomanian, Western Interior Seaway, USA). On the basis of isome
r distribution and isotopic composition. it is proposed that MEA derive fro
m eubacterial organisms, possibly cyanobacteria, living in fresh to brackis
h water environments. (C) 2001 Elsevier Science Ltd. All rights reserved.