5 Early Cambrian drillcore samples and 1 Permian outcrop sample were submitted for determination of the aromatic maturity of their preserved organic matter, to augment the existing petroleum source rock organic geochemistry database for the Stansbury Basin region. The samples were selected from the Kulpara Formation in wells Aquitaine SYC-101 and SADME Port Clinton 1, and from the undifferentiated Permian sequence exposed at Waterloo Bay on the south coast of Yorke Peninsula. Subsequently, the client requested documentation of the alkane biomarker distribution of the Kulpara Formation for comparison with that of the asphaltic bitumen which strands along the coastline of southern Australia. The three core samples from Port Clinton 1 which had been found to have the lowest thermal maturities were chosen for this biomarker analysis. All six rock samples studied are organically lean. Neither the Permian mudstone (0.22% total organic carbon) nor the marine Cambrian carbonates of the Kulpara Formation (0.06-0.16% TOC) are rich enough in dispersed organic matter to be effective source rocks of commercially producible hydrocarbons (extractable organic matter is typically less than 200 ppm). Higher EOM yields (505-663 ppm) at about 378 metres depth in Aquitaine SYC-101 signify staining by migrated hydrocarbons. The thermal maturity of the Kulpara Formation at Port Clinton 1 is within the oil generation and preservation window (mean calculated vitrinite reflectance = 1.16%; present depth 96-102 metres), whereas the same unit in Aquitaine SYC-101 is overmature (mean VRcalc = 1.46%; present depth 368-379 metres). The sterane biomarker signature of asphaltic coastal bitumen from southern Australia is sufficiently similar to that of the Kulpara Formation to indicate possible sourcing of the asphaltite from Early Cambrian anoxic marine sediments within the Stansbury Basin.