GISP2 Stable Isotopes (Deuterium, Deuterium Excess, and Oxygen)

DATA ORGANIZATION
The data consist of two files, each with a different structure:

GISP2_Holocene_deuterium.txt

Column 1 is the top depth (m) of each discrete sample, column 2 is the bottom 
depth (m) of each discrete sample, column 3 is the discrete sample length (m), 
and column 4 is delta deuterium (per mil) over the depth interval with a 
measured precision of 0.5 per mil. 

GISP2_glacial_Isotopes.txt

Column 1 is the top depth (m) of each discrete sample, column 2 is the bottom 
depth (m) of each discrete sample, column 3 is delta deuterium (per mil) over 
the depth interval with a measured precision of 0.1 per mil, column 4 is delta 
oxygen-18 (per mil) with a measured precision of 0.07 per mil, column 5 is 
deuterium excess calculated from columns 3 and 4.

DOCUMENTATION
Please be sure to read the complete documentation in detail before working with 
the data.