dive_core_no  dive_no  core_no  depth_target  shipfix_lat  shipfix_lon  subfix_lat  subfix_lon  month  day  year  cruise_id  depth_core  CH4    d13C_CH4  DIC     d13C_DIC  sulfate  
4490-12       4490     12       2010          27.0077      -111.4085    27.0077     -111.4088   12     14   2008  AT15-40    1           2.47   -42.04    8.14    -5.11     22.81    
4490-12       4490     12       2010          27.0077      -111.4085    27.0077     -111.4088   12     14   2008  AT15-40    3           2.29   -42.12    11.83   -5.78     16.54    
4490-12       4490     12       2010          27.0077      -111.4085    27.0077     -111.4088   12     14   2008  AT15-40    5           2.27   -42.26    12.86   -3.40     9.01     
4490-12       4490     12       2010          27.0077      -111.4085    27.0077     -111.4088   12     14   2008  AT15-40    7           2.01   -42.19    11.72   -3.05     5.00     
4490-12       4490     12       2010          27.0077      -111.4085    27.0077     -111.4088   12     14   2008  AT15-40    9           2.36   -42.24    nd      nd        1.71     
4490-12       4490     12       2010          27.0077      -111.4085    27.0077     -111.4088   12     14   2008  AT15-40    11          2.46   -42.37    13.02   -3.14     0.70     
4490-12       4490     12       2010          27.0077      -111.4085    27.0077     -111.4088   12     14   2008  AT15-40    13          2.66   -42.18    16.74   -4.29     0.37     
4490-12       4490     12       2010          27.0077      -111.4085    27.0077     -111.4088   12     14   2008  AT15-40    15          3.42   -42.21    11.53   -3.15     0.37     
4490-12       4490     12       2010          27.0077      -111.4085    27.0077     -111.4088   12     14   2008  AT15-40    17          3.32   -42.13    14.07   -3.33     0.97