Radium and Thorium Isotopes 
  GEOTRACES Arctic - HLY1502 (GN01) 
 PI: Matthew Charette (WHOI) 
 Co-PI: Willard Moore (University of South Carolina) 
 Version History: 
  2021-07-06 (v4; current) - made correction to Sample_Depth for Sample_ID 10509. 
  2020-04-06 (v3) - re-formatted for GEOTRACES IDP compliance. 
  2019-07-02 (v2) -additional data columns reported; additional columns for units in dpm/L and mBq/kg. 
  2017-10-31 (v1) - version 1 published at BCO-DMO