You have a far better imagination than me my friend. Many of those are undoubtedly geofacts, oddities of nature. It's common to see weird popouts or fossil casts in stone that resemble something manufactured. I know that many shells found with holes in the center of them are caused by birds..i've seen them do it. Freaked me out one day at the lake, I heard "boom, boom!". I turned around to see a water bird beating the hell out of a shell, it commenced to knock a very clean, large, circular hole in the top of it. Since that day, I've observed other birds doing the same thing. Down south in some coastal areas, they also have worms that bore into shells and it will resemble drilling holes (I'm told). ANYONE that has been collecting long has picked up several items thinking they were artifacts..I've done it myself. Everyone has, if they say they haven't, then they are most likely fibbing or never found out the difference. The more common things I see in collections that are mistaken for artifacts are: Fossils / casts, limestone & ironstone concretions (probably THE most common), Crinoid stems (although some were used as beads - most weren't), Battery cores (the really can resemble a bar banner or pecked and ground item), spalls (by-product, debris, but often thought to be a completed artifact), Historic crockery (can fool even the best), wiring insulators (super common, people think they are tube pipes)....and there are many more! My favorite one of all time was a lady who had a rock that she could "see and indian riding a horse in it..if you look hard enough"....it was a chunk of road asphalt.
I'm not saying all of your artifacts are geofacts, but some of them I'm pretty sure are. I just hope to stir people to check for tooling marks when unsure of the origins..and to learn how to properly identify manufacturing marks. Thanks for sharing! I really do like looking at them.
