crevasse
6.The branch fell from the tree; The unfortunate hiker fell into a crevasse.
7.If you feel nothing but air underneath, you[chr(39)]ve hit a crevasse (figure 2).
8.One of the biggest hazards of glacier travel is breaking through a snow bridge and falling into a crevasse.
9.Remember that these instructions are only the very basics -- real crevasse rescues can be tense and confusing situations.
10.Channels, natural levees, crevasse splay, floodpl ain, lakes, marshes and eolian dunes are important morphological and sedimentary units.
