Striped rocks or fossils?

[Beaglejuice13]

Found these here in Indiana in a field stone pile over at my friend's farm. Just rocks or are they stromatolites?

 

[dognose]

Interesting finds. The rock with the concentric rings looks crazy round.

What part of Indiana? What water source is near by?

 

[Hillbilly Prince]

Found these here in Indiana in a field stone pile over at my friend's farm. Just rocks or are they stromatolites?

Maybe contact the geology dept at nearest university.
Those top two look like they were intentionally formed lol.

 

[Beaglejuice13]

Here's another pic of the top one. There are only two diff rocks, the first 3 pics are the same rock. It isn't as round as those pics make it look. I was just embarrassed to post this other angle for some reason lol. But, here u go lol. I found them in Northern Indiana, a small town called Orland about 15 minutes south of Sturgis, Michigan. There is a small lake at the back of the field called Grassy Lake.