Snow pit 13th Jan 2010

Pit profile 13th Jan.
From the bottom up the crystals are:
Mixed Form 70 - 60
Slush/Wet Grains 60 - 50 finger hard
Slush Wet Grains 50-40 pencil hard
Wet Grains/Mixed 40 - Surface 4 fingers hard

What does it mean?  Have a think ...........................