Here is a reasonably complete cohesion analysis of the extract of the 'Avalanche text'.

You may still be able to find some other cohesive ties, especially lexically cohesive ties as these can be constructed both from the lexical system and from the instantial meanings (i.e., the particular relationships) created in this particular text.

Remember the essential definition of cohesion is that one part of the text needs another part of the text in order to be understood and that this is not expressed structurally. An example of a structural relationship would be between a relative clause and its antecedent.