Concentrations of Major and Trace Elements in Streambed and Floodplain Sediment along the Middle Big River and Tributaries in the Southeast Missouri Barite District and in Quality-Assurance Samples, 2012-15.

These data contain concentrations of trace elements in various size fractions (less than 0.063 millimeters, 0.063 to 0.250 millimeters, 0.250 to 2 millimeters, and greater than 2 millimeters) of flood-plain core samples analyzed by inductively coupled plasma mass spectrometry (laboratory) and x-ray fluorescence (U.S. Environmental Protection Agency).