The Cambrian succession in South Australia is richly fossiliferous, but relatively little studied biostratigraphically. The Cambrian Biostratigraphy Project aims to provide a biostratigraphic framework similar to that available for the Cretaceous and Tertiary of the state. Preliminary micropalaeontological work done on sedimentary rock samples obtained from Sellick Hill and Curramulka indicates the presence of abundant microfossils in the South Australian Early Cambrian succession. Studies carried out overseas, especially in the U.S.S.R., confirm that such groups are of biostratigraphic use. A detailed examination of Early Cambrian successions on Yorke Peninsula and at Bunyeroo Gorge in the Flinders Ranges is proposed. These sections include the little studied Faunal Assemblages 1-7 of Daily (1956).