Ice with everything - Antarctica: Global Science from a Frozen Continent - page 95

Figure 3.20 Photograph of an EPICA Dome C drill head

and a deep ice core. The diameter of the ice core is about
10 cm. (Credit: Photothèque CNRS/L. Augustin)

Figure 3.21 Photograph of a thin slice of an ice core, taken

at a depth of about 500m. Air bubbles are clearly visible.
These air bubbles are slowly trapped in the ice matrix at a
depth of 80 to 100m below the snow surface. At deeper
depths and therefore higher pressures, air bubbles are no
longer visible as air hydrates are formed. (Credit: BAS)

Figure 3.22 Photograph of

a thin slice of ice from Law
Dome, Antarctica, taken
under polarised light with a
microscope. The orientation
of the ice crystals is re ected
in their colour. The real
length of the sample is
about 1 cm. (Credit: Marc
Delmotte, LSCE)