FIGURE 1. Measured parameters from the EPICA Dome C ice core, on an ice depth scale.
From the following article:
Eight glacial cycles from an Antarctic ice core
EPICA community members
Nature 429, 623-628(10 June 2004)
doi:10.1038/nature02599
a, 
D, averaged over 3.85-m sections. b, Grain radius, measured approximately every 10 m. c, Dust concentration—below 787 m, there is one sample every 5.5 m; above that, one sample every 1.5 m. d, Electrical data (as discussed in the Methods), in 1-m averages. Termination V is marked by an arrow in a.
