Tectonic plates push together at the boundary because the plates are always moving and they never stop. when they are pushed together, they go against each other and since there is no place to push, they both push upwards. it'll take a long time for them to create mountains.
Would weaken the hypothesis beacuse it would show that many droughts indicated in the stalactites do not always show a collapse in society. Societes could therefore cope with droughts.
