Dataset: Age model built from planktic foraminifera radiocarbon in the eastern Pacific during the last deglaciation determined from core MAZ-1E-04 collected on cruise MAZ-I aboard the R/V El Puma in April 2015

Please see Alcorn et al. (2026) for a more detailed methodology.

Core MAZ-1E-04 (MAZ-I E04G) was collected on the oceanographic cruise MAZ-I aboard the R/V "El Puma" on April 28, 2015 using a gravity corer.

Two batches of mixed planktic foraminifera from the >150 µm size fraction were sent to the National Ocean Sciences Accelerator Mass Spectrometry Facility (NOSAMS) for analysis. A third batch was analyzed at the Alfred Wegener Institute using their Mini Carbon Dating System. Planktic 14C ages were corrected to atmospheric 14C ages by subtracting Marine Reservoir Ages (MRAs) from the planktic ages. The MRA corrections are reported from previous literature near our site (Butzin et al., 2020). The MRA-corrected planktic 14C ages were then calibrated against the IntCal20 curve using the Bchron software package (Haslett & Parnell, 2008). Midpoints of the 13 calibrated planktic 14C ages were used to create this core’s age-depth model using Bchron’s Bchronology function.