Obscure Woods would be a variate type dungeon (Like Beedrill, Pikachu, Weedle, Swinub, Venipede, and many other types). Frozen Quarry Trail would mainly have some variation, but the Ice Types are more common here. Ice Spike Plains would have Ice Types mainly too. Frozen Quarry is more Rock and Ground than Ice Types Appearing (Probably Swinub would be only ice Type there), and going deeper you would find Fire Types because you will be deeper in the underground. So if you decide one of these, here is some info. Feel free for giving edits to it.