Creekin' is panning a creek or stream for gems or precious metals. These people are creekin' for emeralds and other treasures at the Emerald Hollow Mine in North Carolina.
Creekin' is tons of fun. The rocks (surprisingly) were not slippery, nor were they coated with green slime. The water was icy (it was March after all), but clear so it was easy to look for sparklies or the shapes and colors that could indicate valuable crystals.