Hydrocarbon production from the Slave Point Formation at Slave Field (T84, RI4W5), north-central Alberta, is light gravity (−35 API) oil. Leaching of megafossils, associated with dolomitization, has contributed to porosity development within the Slave Point Formation. The following report interprets the sequence of events which led to carbonate-reservoir development, based on data from eleven cores which penetrated the Slave Field reservoir. These data indicate that relative seA-1evel rise initiated shallow-water carbonate sedimentation on the flanks of a subaerially exposed granite-basement high. Subsequent seA-1evel rise resulted in upward growth of a carbonate bank which fringed the basement high. Core control documents a facies zonation from more open-marine type facies at the outer edges of the bank, to more restricted facies in the bank interior. An exposed granite island was present in the center of this carbonate bank, and continued seA-1evel rise led to progressive onlap of the granite structure.