This is another great Hort image that begs for ...

This is another great Hort image that begs for melting and phase change in the trench.

The team said that the ice was hard as a side walk. That makes sense because it gets cold there. There was a time they used the router to collect ice samples. As time has gone by they have been able to remove more surface material and leave tool marks in the trench after exposure to the sun.

The white areas are, frost on ice, ice shavings and the darker areas are frost heave. Good stuff.

Fred