Those are cool, glad you posted them! :~D Rocky parts! And big flat rocks to step over!
We do have bands of rocky ground here, called glacial till, that are all round rocks, like river rocks, supposedly carried along and ground smooth by the glaciers during the ice age, and then they melted out. We have only a little of that here at home, it's my goal to go to any property we seek to buy and dig a post hole. I don't want to have to dig 100 post holes for a boarding stable in one of those rocky pieces of ground :~D
If we knew then what we know now, we probably wouldn't have bought this land. I really don't regret it now tho. The rocks are probably a big reason there isn't more people living out here and putting up fences. So they are a blessing as much as a problem.
Becky