# Alfred Treibs Back to [[Abiogenic Oil and the Fossil Fuel Debate]] · [[Research and Evidence]] **Role:** German chemist; father of organic geochemistry - In [1934](https://doi.org/10.1002/jlac.19345090108) he identified chlorophyll-derived porphyrins in Triassic oil shale. It was the first biomarker evidence for the biological origin of petroleum.