flow under stress
... that deposits of rock salt are mechanically weak, and may flow under stress?
... that deposits of <a href="./Halite" id="mwag" rel="mw:WikiLink" title="Halite">rock salt</a> are mechanically weak, and may <b id="mwaw"><a href="./Salt_deformation" id="mwbA" rel="mw:WikiLink" title="Salt deformation">flow under stress</a></b>?