Isotopic composition (13C and 14C) of sedimentary organic carbon within sediments collected aboard multiple research cruises in the southern Gulf of Mexico from 2011-08-03 to 2016-08-30

This dataset contains Isotopic composition (13C and 14C) of sedimentary organic carbon within sediments collected aboard R/V Weatherbird II (WB1701, WB1603) and R/V Justo Sierra (JS0815) cruises in the southern Gulf of Mexico from 2011-08-03 to 2016-08-30. The data from 2015 are inclusive of data available under GRIIDC Unique Dataset Identifier (UDI) R4.x267.000:0005 (doi: 10.7266/N7SN0700) with additional analysis such as the age based on ^14^C. The dataset also includes the sample collection date, location, and depth of water. Finnigan DELTAplus XP by Thermo Fisher Scientific was used to determine the stable isotopes of carbon and nitrogen.