rad_sed_core

 PI:              Bob Anderson
 of:              Lamont-Doherty Earth Observatory
 dataset:         Radionuclides, sediment cores
 project/cruise:  EqPac/TT013, Benthic survey
 ship:            R/V Thomas Thompson

 Methodology

 PI notes:
 1..Error bars for all variables are plus or minus one sigma
 2..Each sample is a one centimeter sample centered on the depth indicated
    by the parameter depth_core.
 3..C14 ages obtained by the University of Arizona Accelerator Mass 
    Spectrometer (AMS) Facility using bulk sediment CaCO3.  
    C14 age values uncorrected.
 4..Based on a comparison of Piston core and Trigger core for station/core 32,
    it appears that about 10 (cm) of sediment was lost from the top of the
    piston core.  Thus core 32, samples at 5.5 and 10.5 (cm) are from 
    trigger core.  


  Parameter    Description                                   Units

  event        event number from event log
  sta          station number from event log
  lat          latitude, minus value means South             decimal degrees
  lon          longitude, minus value means West             decimal degrees
  core_type    type of coring instrument used,
                 where gravity means gravity core
                 where multi means multi core
                 where piston means piston core
  depth_core   depth in core, mid-point of interval          centimeters
                 sampled
  U238         uranium-238                                   dpm/gram
  U238_err     uranium-238 error, plus/minus one sigma       dpm/gram
  Th232        thorium-232                                   dpm/gram
  Th232_err    thorium-232 error, plus/minus one sigma       dpm/gram
  Th230        thorium-230                                   dpm/gram
  Th230_err    thorium-230 error, plus/minus one sigma       dpm/gram
  Pa231        protactinium-231                              dpm/gram
  Pa231_err    protactinium-231 error, plus/minus one sigma  dpm/gram
  Be10         beryllium-10                                  atoms/gram
  Be10_err     beryllium-10 error, plus/minus one sigma      atoms/gram
  CaCO3        calcium carbonate                             percent
  opal         opal                                          percent
  C14_age      carbon-14 age dating (uncorrected)            years
  C14_age_err  carbon-14 age error, plus/minus one sigma     years