1. The problem statement, all variables and given/known data Given that a rock is 60% porous, and if it's subjected to a large pressure that closes the pore spaces of the rock, what is the dilatation 2. Relevant equations dilatation = ΔV/Vo= εxx + εyy + εzz 3. The attempt at a solution Is this problem as easy as it states? If the rock shrinks by 50%, such that the pore spaces close, then the dilatation would be (1-.4^3)/1 = 0.936. So would dilatation be 0.936?, where (1-.4^3) represents the change in volume? Thanks for the help.