B Bulawaya and Witwatersrand

The interesting compounds furaldehyde and benzonitrile were detected by vacuum pyrolysis-gc-ms. These products were interpreted respectively as remnants of biological 

Gaschronmtogramm of volatile organic matter of the Bulawaya stromatolite, Zimbabwe. Pyrene and naphthalene added as internal standards (McKirdy and Hahn, 1982) 5  

The IR spectra of these kerogens show high concentrations of carbonyl and carboxyl groups indicating strong oxidation of the organic matter. This alteration 

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