| Sample identification |
|---|
| id | Primary ID or field number |
| Geographic location |
|---|
| lat_dms | Latitude in degrees, minutes, seconds (blank for this data set). |
| lon_dms | Longitude in degrees, minutes, seconds (blank for this data set). |
| state | State in which sample was collected. |
| county | County in which sample was collected. |
| latitude | Latitude of sample site in decimal degrees. |
| longitude | Longitude values, west longitudes negative |
| Processing information |
|---|
| date_coll | Date the sample was collected |
| Chemical analysis |
|---|
| al_pct | Aluminum concentration |
| as_ppm | Arsenic concentration |
| b_ppm | Boron concentration |
| ba_ppm | Barium concentration |
| be_ppm | Beryllium concentration |
| br_ppm | Bromine concentration |
| c_pct | Carbon concentration |
| ca_pct | Calcium concentration |
| ce_ppm | Cerium concentration |
| co_ppm | Cobalt concentration |
| cr_ppm | Chromium concentration |
| cu_ppm | Copper concentration |
| f_pct | Fluorine concentration |
| fe_pct | Iron concentration |
| ga_ppm | Gallium concentration |
| ge_ppm | Germanium concentration |
| hg_ppm | Mercury concentration |
| i_ppm | Iodine concentration |
| k_pct | Potassium concentration |
| la_ppm | Lanthanum concentration |
| li_ppm | Lithium concentration |
| mg_pct | Magnesium concentration |
| mn_ppm | Manganese concentration |
| mo_ppm | Molybdenum concentration |
| na_pct | Sodium concentration |
| nb_ppm | Niobium concentration |
| nd_ppm | Neodymium concentration |
| ni_ppm | Nickel concentration |
| p_pct | Phosphorus concentration |
| pb_ppm | Lead concentration |
| rb_ppm | Rubidium concentration |
| s_pct | Sulfur concentration |
| sb_ppm | Antimony concentration |
| sc_ppm | Scandium concentration |
| se_ppm | Selenium concentration |
| si_pct | Silicon concentration |
| sn_ppm | Tin concentration |
| sr_ppm | Strontium concentration |
| ti_pct | Titanium concentration |
| th_ppm | Thorium concentration |
| u_ppm | Uranium concentration |
| v_ppm | Vanadium concentration |
| y_ppm | Yttrium concentration |
| yb_ppm | Ytterbium concentration |
| zn_pct | Zinc concentration |
| zr_ppm | Zirconium concentration |
