I'm new to the forum, but I'm going to add my 2 cents.
I don't think they are Geofacts. I've found several of the same/similar type stuff around here in Kentucky. Just because we don't have a modern classification for it, or 'name' for it, doesn't mean it's not an indian artifact.
A lot of you all must remember that up until an atl-atl weight was found attached to an atl-atl by W.S. Webb back in the 1930's people thought bannerstones were 'Geo-Facts' or pendants at best! It will take some more of these to be found for them to classify them, and they will get some archaeologist's attention, and they will figure it out. That looks like sandstone in the first pic, and sandstone wouldn't erode in simetry like the pic shows. Those look like man-formed stones.