Originally posted by cubanoplay:

keep digging! They are bigger than they seem.

you can say that again :) The copper deposits usually go all the way down to "bedrock". When I mine I always end up with HUGE pits.

Then I use an Abysall harpoon to put a Troll in it. Contains the danger and keeps another Trolls from spawning in the same general area. Improves safety while I log the area for core wood and gather Blueberrys & thystles :D