Sedimentologic Data from Point aux Chenes Marsh and Estuary, Mississippi

Sediment samples, including marsh and estuarine surface samples and marsh push and peat-auger cores, were collected from Point aux Chenes, Mississippi from October 23-26, 2018. Marsh surface samples (top 1 centimeter (cm) of sediment; sample names appended with S), marsh push cores (core names appended with M) and peat-auger cores (core names appended with R) were collected along 50-meter (m), shore perpendicular, transects identified as sites 5, 6, 7, and 8. All samples in the dataset are referred to by field activity number (FAN) 2018-358-FA (alternate FAN 18CCT09). Estuarine PONAR grab samples (sample names appended with G), marsh surface samples and push cores were collected and brought back for sedimentological analyses including dry bulk density, organic content, and grain-size for the development of a sedimentological baseline, and gamma spectroscopy for the development of geochronologies. Peat augers were collected in the field, described for depth to peat, and discarded in the field. Marsh and estuarine surface and core sediment samples are part of the St. Petersburg Coastal and Marine Science Center Estuarine-MaRsh Geology (EMRG) and Sea-level and Storms Impacts on Estuarine Environments and Shorelines (SSIEES) research projects which study how and where short- and long-term marsh and estuarine coastal process interact in order to identify and evaluate geologic and geomorphic variables influences on marshes and their resiliency under different storm and sea-level scenarios, determine marsh-upland boundary change rates, and sediment accumulation and erosion rates.