These a truly bizarre …specimens? Artifacts? Well, spherical objects found embedded in rock, millions of years old.
ARTICLE LINK WITH PHOTOS.
Strange that they’re called “spheres” when the photo in the article shows a decidedly nonspherical shape. The article says they are concretions created by precipitation of minerals dissolved in water. I think it’s the same process that made the “blueberries” found on Mars by the Opportunity rover.
As the article notes, they are “spherical, elliptical, or oblate objects”. So even though they are nicknamed “spheres”, only some of them are.
The wikipedia page has a section critiquing the claims made about the “spheres”:
There are also some more typical images (not the “cricket ball” image included in that article):
The general public’s complete ignorance of geology will never cease to amaze me.
I’m honestly amazed you’re amazed. At least in the U.S. it is not part of a normal public school curriculum in any depth, even much at the level of general science classes which IME tend to focus much more on basic biology. You might do a section or three over the course of twelve years and learn about tectonic plates as they relate to earthquakes and the difference between igneous and sedimentary rocks (which most people won’t remember). But that’s about it.
Also, probably only a handful of non-geology majors will take even an introductory geology course in college. I never did and I find that stuff interesting 
. I wish I had and always meant to, but just not enough room in the schedule.
I, on the other hand, didn’t take biology in high school, instead opting for geology (which I find to be one of the more fascinating studies).
It is literally the ground everyone stands on. It’s the absolute, utter lack of even a sliver of curiosity that I find fascinating.
That and just how damn often ignorance of geology pops up in pseudoarchaeology or ancient aliens or similar contexts. “Oh, they must be artifacts, Mother Nature don’t make no spheres!”, “Oh, this underwater location must be man-made, ain’t no right angles in nature!”, on and on. Not knowing about geology leaves you vulnerable to believing all kinds of made-up junk. Learning about geology is an antivirus to bullshit.
“Antivirus to bullshit” sounds like something more likely to be covered in a biology class.
Well, metaphorical bullshit isn’t biological, and the metaphorical idea of inoculating one’s self from pseudoscience with real science is sound.