Just listened to Bill Reel's latest MDP. I'm a major rock nut so I really enjoyed this one. Not only that, but just last week DW and I were in the Hanksville badlands and we both found quite a few gastroliths of our own. We didn't know what they were at first. We were out gathering petrified wood and came across these unusual polished rocks that had a greasy feeling surface. We were not in a river bed so it just didn't make sense. These stones are from the gizzards of several types of plant eating dinosaurs around 200+ million years old. I'm still geeking out over all the cool rocks we found. Oyster shells from 100m, petrified wood from 225m, agate, wonder stone, selenite crystals and lots of other cool things.
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