my brother and i were at a lake in TEXAS . got a reading but had to move some rocks to get down to it. he tossed a rock, then another that hit the first rock, it split open and a fossil was inside. we were excited, so we moved other rocks, breaking them as we went. all told we found 5 fossils, each a little larger or smaller than the first. interesting thing is...one of these still had 'body parts' in it. what ever made the forms in the rocks still hadn't disappeared. it was only 1/2 gone. the fossils are about 1/4" wide x 11/8"x 1 5/8" long. rounded at ea. end. we think it may be dung that survived all these millions of years it takes to form a fossil, but at least we'd know what ever made the dung (if that's what it is) was eating all those years ago. for reasons unknown to me if you have any ideas as to what it might be, when i click on the answer (if any) i am unable to open the idea as to what it may be so i guess ya'll know i found a fossil of some sort w/ parts of it still in it.