i have no idea where this Nunavit is located, but it looks like boring area, that can be very enjoyable. great rocks,great ancient granits, and lichens. macro lens would benefit to the shots, agree with you. telephoto? not sure of that, probably no... when I visit Karelia, I am pretty fine with 50mm most of the time.

lichen does not like to cross over other species of lichen.

I witnessed quite the contrary cases - red/orange lichens suppress the grey one :P

anyway, nice story and great stuff observed. thank you for sharing!