Freezing, expanding, thawing, and repeating: that is what the water from the heavy fall rain and snow has been doing along the Hardscrabble deep inside the tiny and invisible cracks in the granite layers that define the mountain range for the past few months. Unseasonably warm temperatures and high winds finally allowed a weak rock face at the intersection of Highway 96 and 165, known as Mackenzie Junction, to collapse in a large landside Sunday afternoon that has closed the highways indefinitely. Drivers started to notice a dusting of small rocks around 1 p.m. By 2 p.m., motorists were forced to work around large rocks that had tumbled into the road. One video sent to the Tribune by Mariah Raymond showed large cracks forming in…