Biomarker and isotopic signatures of an early Cambrian Lagerstätte in the Stansbury Basin, South Australia

► First report of Gloeocapsomorpha prisca biomarkers in a Cambrian Lagerstätte. ► The Emu Bay Shale Lagerstätte was deposited in the photic zone. ► Cyanobacterial mats helped preserve its non-mineralised fauna. ► Indigenous hydrocarbons released from kerogen by MSSV thermal desorption.