So due to family complications some of my fossil collection will have to stored outside. The best pieces are inside my house but my B-grade specimens are going to be left out in the dead of winter. I'm not worried about the ridiculously hard limestone specimens I have (it might even be good for them) but some Green River material and some U-Dig will be outside which I am worried about. Does anybody have some experience with this that they'd be willing to share?