We sampled lowermost middle Miocene to Pliocene sections exposed in roadcuts east of Buff Bay, Jamaica, for quantitative benthic foraminiferal studies. Our analyses document paleobathymetric changes and sediment sources. The Spring Garden Member of the Montpelier Formation and the Buff Bay Formation (middle to upper Miocene) were deposited at lower bathyal paleodepths (1,000 to 2,000 m) that probably exceeded 1,300 m, while the overlying Bowden Formation (Pliocene) was deposited within the upper bathal zone (200 to 500 m). A significant portion of the benthic foraminifera found in Buff Bay sections consists of transported shallow-water reefal elements (.Amphistegina spp./Asterigerina spp.) occurring in otherwise in situ deep-water bathyal biofacies. The lower part of the Spring Garden Member (middle Miocene) contains a typical cosmopolitan lower bathyal biofacies dominated by Globocassidulina subglobosa, Cibicidoides mundulus, Stilostomella aculeata, and Oridorsalis spp. A biofacies change that occurs within the Spring Garden Member may reflect the well-documented global benthic foraminiferal taxonomic turnover that occurred throughout the deep sea from early to middle Miocene Biochrons N8 to Nil. The upper Spring Garden Member and portions of the Buff Bay Formation (middle Miocene) faunas are characterized by the apparently endemic species Compressigerina coartata and Siphouvigerina porrecta; we interpret this as an in situ lower bathyal biofacies. Much of the Buff Bay Formation (middle-upper Miocene) is dominated by Reusella spinulosa var. pulchra, Uvigerina proboscidea, Rosalina sp. 1, and Siphouvigerina porrecta', although this assemblage may be an in situ lower bathyal biofacies, there is evidence to suggest that it may be a transported thanatofacies. The Bowden Formation (Pliocene) is characterized by an upper bathyal (200 to 600 m) biofacies dominated by Butimina aculeata, Globobulimima spp., Planulina foveolata (lower depth limit is 500 m), and Uvigerina sp. 1. The change in benthic foraminiferal biofacies between the Buff Bay and Bowden Formations reflects the tectonic uplift of the north coast of Jamaica. We estimate that at least 800 m of shallowing occurred between the late Miocene (ca. 8 Ma) and Pliocene (ca. 4 to 3 Ma) during the hiatus that separated deposition of the Buff Bay and Bowden Formations. A subsequent shallowing occurred from the Pliocene (bathyal paleodepths >200 m) to the Pleistocene (neritic depths <60 m; Robinson, 1969).