It there a road at the bottom of the hill?
This depends on the fluid; If it is water based it can change in mineral composition without having to melt.
<span>If the fluid is a magma high-temperature fluid this can melt the rock and/or bake the rock, which causes a contact aureole to form on the outer rock walls. this metamorphoses the rock wall. </span>
<span>The size of the aureole depends on the heat of the intrusion, its size, and the temperature difference with the wall rocks.</span>
Reproductive isolation is when 2 organisms can not mate and produce viable offspring. Once 2 organisms are reproductively isolated, this is considered speciation event.
