Day 21 Mull Geology Advent calendar

Day 2 and its another map  -an unusual one this. i was given this by someone who was getting rid of a load of stuff. Scale is one inch to four miles. An awful lot of empty sea as well. Great map though. It came mounted on board. Used to hang in the hallway until the "Eastern Mull" map replaced it - that was shown on Day 1 of the Calendar!