Organic compounds in Precambrian sedimentary rocks

In recent years some data have been obtained on the content of organic compounds (hydrocarbons, carbohydrates, paraffins and aromatic compounds, alcohols, etc.) in Precambrian sedimentary rocks, including the rocks of the cherty iron-formations. 

Sidorenko and Sidorenko (1970) made a detailed study of carbon-containing rocks, including the graphitic gneisses of the Pri-Azov area and Krivoy Rog (Table VII). It was established that despite the profound 

Characteristics of bitumens from graphite gneisses of the Ukrainian shield (after A. and S. Sidorenko) 

Brief interpretation of infrared spectra of bituminous matter of chloroform extract 

Pri-Azov area 10.3 0.004 70.16 10.52 Paraffin and aromatic structures (about equally abundant). Main part— non-carbon structures 

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