we propose that the deposits arose in four main ways : ( 1 ) displacement of water from underlying cells by a pressure wave resulting from the volume increase of intracellular water as it freezes , ( 2 ) evaporation of water from warmer cells and its condensation onto colder cells , ( 3 ) withdrawal of water from underlying cells by extracellular ice crystallization , ( 4 ) condensation of pre-existing water vapour in the intercellular spaces onto cells .
C0043047
water
C0020746
ice