The following abbreviated data report presents results of ground water and stream/surface sediment reconnaissance in the Trona quadrangle, California.

Supplementary tabulated data of elemental concentrations in surface sediment samples and ground water samples to accompany a report on hydrogeochemical and stream sediment reconnaissance.

From abstract: This abbreviated data report presents results of ground water and surface sediment reconnaissance in the National Topographic Map Series (NTMS) Salton Sea 10 x 2 quadrangle. Surface sediment samples were collected at 997 sites. Ground water samples were collected at 76 sites. Neutron activation analysis (NAA) results are given for uranium and 16 other elements in sediments, and for uranium and 9 other elements in ground water. Mass spectrometry results are given for helium in ground water. Field measurements and observations are reported for each site. Analytical data and field measurements are presented in tables and maps.

Data gathered at ground water sites in the Trona quadrangle, including applicable water chemistry measurements (e.g., pH, conductivity, alkalinity), physical measurements (e.g., temperature, well description, scintillometer readings), and elemental analyses.

Data gathered at sediment sampling sites in the Trona quadrangle, including applicable areal maps, histograms, elemental frequency plots, scintillometer readings, and other data.

Tabulated data gathered at surface sediment and ground water sites in the Trona quadrangle, including applicable reconnaissance measurements and elemental analyses.

Detailed descriptions of the data report for Trona quadrangle, including (1) sample collection and field measurements, (2) formats, abbreviations, and codes in the data tables, (3) graphs and maps, and (4) quality assurance programs for sample collection and analysis.