Snoball Solar System

That appears to be a clastic rock, likely red sandstone, with remarkably-well defined bedding that's been selectively eroded away to leave a layer-cake pattern.  (Next time add a coin in the picture for scale.)

That's a greywacke river cobble, but the interesting thing is the nodular brown rock scale, on 'one side only'.

I suggest that the nodular brown rock scale is comet spatter delivered to southern WI by way of an eject curtain composed of ice sheet fragments, from a primary (Clovis comet) impact on the Laurentide ice sheet, 12,800 years ago.  The rock scale is on the side of the river rock exposed to the secondary impact, which is why the scale is on one side only.

These same massive ice sheet fragments are suggested by others to be responsible for creating the Carolina bays along the Atlantic and Gulf coasts.

What you have there is a Little Debbie Oatmeal Cream Pie.  I recommend that you eat it, regardless of where you found it, since each pie is individually sealed for freshness.  (But then again, I can't even spell "Snowball", so don't take it from me.)