Between the Santa Isabel and the Granada projects, twenty-five new radiocarbon dates have been added to the Nicaraguan chronological sequence. Almost all of these relate to the Sapoa period, traditionally dated between 800-1350 CE ( ), but several dates correspond to the late Bagaces period (300-800 CE). Several dates from El Rayo support the 800 CE date for the transition between Bagaces and Sapoa, and the associated assemblages suggest that the transition was relatively rapid and the cnange in material culture relatively extensive. Dates for the end of the Sapoa period suggest that settlements were abandoned by about 1250 CE, suggesting that that transition may need to be shifted slightly earlier. Dates from the PAGN project include:
Beta-265450 1230+40 BP AD710-870 AD 680-890
Beta-265451 N504 E499 L9 1220+60 BP AD 690-890 AD 660-970
Beta-265453 N485 E460 L10 1030+50 BP AD 980-1030 AD 900-1140
Beta-265454 N503 E480 L15 1430+40 BP AD 600-650 AD 560-660
Beta-265459 N485 E460 L9 960+40 BP AD 1020-1150 AD 1010-1170
Beta-265462 N504 E480 L7 1360+40 BP AD 650-670 AD 620-690
Beta-265463 N505 E499 L6 1220+40 BP AD 720-880 AD 680-890