Later I met up with Bob who took me to a spot that produces siderite. I could see that the bedrock was exposed in this creek. We walked down to an area where the weeds and kudzu that had overtaken the bank had dried up and withered for the winter. Bob made his way to a spot where he raked the dead weeds back and pointed at small crystals of siderite that were sticking out of the the saprolitic bedrock.